DEPARTMENT OF AGRICULTURE
Conservation Services Division
8 CCR 1206-2
RULES PERTAINING TO THE ADMINISTRATION AND ENFORCEMENT OF THE COLORADO NOXIOUS WEED ACT
Part 4	List B Noxious Weed Species
4.3.	Local governing bodies and other interested parties are encouraged to make special note of the distribution and abundance of Canada thistle, Dalmatian toadflax, leafy spurge, houndstongue, perennial pepperweed, salt cedar, spurred anoda, Venice mallow, and yellow nutsedge as the Commissioner will consult with the state noxious weed advisory committee, local governments, and other interested parties, in order to develop and implement state noxious weed management plans in 2007 – 2008 2006-2007 designed to stop the continued spread of these species. State noxious weed management plans for additional List B species will be developed in future years.
4.7.	State Noxious Weed Management Plans for List B Noxious Weed Species
4.7.1.	Absinth wormwood. In addition to the requirements set forth in this Part 4 for the management of all List B species, the following conditions also apply for absinth wormwood:
A.	Elimination of all populations is required prior to seed development in 2005 in all Colorado counties except for Eagle, Garfield, Gunnison, and Pitkin, and Weld Counties. 
B.	Except as specified in Part 4.7.1DE, elimination of all populations in Eagle, Gunnison, and Pitkin Counties must be completed prior to seed development in 2007.
C.	Except as specified in Part 4.7.1E, elimination of all populations in Eagle and Weld Counties is required prior to seed development in 2009.
CD.	Except as specified in Part 4.7.1DE, elimination of all populations in Garfield County must be completed prior to seed development in 2008 for all land north of Interstate Highway 70, west of State Highway 82 from Glenwood Springs to Carbondale, and west of State Highway 133 from Carbondale to the southern border of Garfield County.  For all other lands in Garfield County, suppression is the specified State management objective (see Rule 4.8, Figure 1).
DE.	All populations in this state that are within 15 feet from the edge of any public road and any immediately adjacent area used for parking must be eliminated prior to seed development in 2005. 
EF.	The prescribed integrated management techniques for the eradication of designated populations are limited to the use of herbicides approved by the Commissioner and hand-pulling, digging, or other mechanical techniques approved by the Commissioner.
FG.	Prescribed integrated management techniques do not include the use of: (1) any biocontrol agents or; (2) any herbicides, cultural techniques, or mechanical techniques other than those approved by the Commissioner.
GH.	Seed longevity is unknown. Infested sites must be monitored for at least 10 years after the populations have been eliminated and treatments must be repeated when necessary to prevent flowering and development of seed.
4.7.2.	Chinese clematis. In addition to the requirements set forth in this Part 4 for the management of all List B species, the following conditions also apply for Chinese clematis:
A.	Elimination of all populations is required prior to seed development in 2005 in all Colorado counties except for Clear Creek, El Paso, Garfield, Gilpin, and Jefferson Counties.
B.	Except as specified in Part 4.7.2FH and in Part 4.7.2GI, elimination of all populations in Clear Creek County must be completed prior to seed development in 2008. 
C.	Except as specified in Part 4.7.2H and in Part 4.7.2I, elimination of all populations in Gilpin County is required prior to seed development in 2009.
D.	Except as specified in Part 4.7.2H and in Part 4.7.2I, elimination of all populations in Garfield County is required prior to seed development in 2010.
CE.	Except as specified in Part 4.7.2FH and in Part 4.7.2GI, elimination of all populations in El Paso County must be completed prior to seed development in 2005 for all land east of Interstate Highway 25 from the northern El Paso County border to Exit 150 (Academy Blvd), all land east of Academy Blvd from its northern intersection with Interstate Highway 25 at Exit 150 to its southern intersection with Interstate Highway 25 at Exit 135, and all land east of Interstate Highway 25 from Exit 135 (Academy Blvd) to the southern El Paso County border.  Elimination of all populations in El Paso County must be completed prior to seed development in 2007 for all land west of these demarcations (see Rule 4.8, Figure 2).
DF.	Except as specified in Part 4.7.2FH and in Part 4.7.2GI, elimination of all populations in Jefferson County must be completed prior to seed development in 2005 2009 for all land south of latitude 39°33.934’N. North of latitude 39°33.934’N, elimination of all populations in Jefferson County must be completed prior to seed development in 2006 2009 unless otherwise specified in this plan (see Rule 4.8, Figure 3). 
EG.	The Commissioner may determine that some populations cannot safely be eradicated because of the steepness or instability of the mountainous terrain on which they are located. In such cases, the requirement for elimination may be waived.
FH.	All populations in this state that are within 15 feet from the edge of any public road and any immediately adjacent area used for parking must be eliminated prior to seed development in 2005. 
GI.	All populations in this state that are within 15 feet of the high water line of any intermittent or perennial stream or river must be eliminated prior to seed development in 2006. 
HJ.	The prescribed integrated management techniques for the eradication of designated populations are limited to the use of herbicides approved by the Commissioner and digging, or other mechanical techniques approved by the Commissioner.
IK.	Prescribed integrated management techniques do not include the use of: (1) any biocontrol agents or; (2) any herbicides, cultural techniques, or mechanical techniques other than those approved by the Commissioner.
JL.	Seed longevity is unknown. Infested sites must be monitored for at least 10 years after the populations have been eliminated and treatments must be repeated when necessary to prevent flowering and development of seed.
4.7.3.	Plumeless thistle. In addition to the requirements set forth in this Part 4 for the management of all List B species, the following conditions also apply for plumeless thistle:
A.	Elimination of all populations is required prior to seed development in 2005 in all Colorado counties except for Eagle, Garfield, Gunnison, Jefferson, Logan, and Pitkin and Summit Counties.
B.	Except as specified in Part 4.7.3H, elimination of all populations in Logan and Summit Counties is required prior to seed development in 2008.
C.	Except as specified in Part 4.7.3H, elimination of all populations in Jefferson County is required prior to seed development in 2009.
BD.	Except as specified in Part 4.7.3FH, elimination of all populations in Eagle County must be completed prior to seed development in 2008 for all land within the Eagle River watershed found upstream from Exit 167 of interstate highway 70 (39°38.232’N, 106°31.387’W) and all land within the Colorado River watershed found upstream from the convergence of Sweetwater Creek and the Colorado River (39°43.232’N, 107°01.947’W).  For all other lands in Eagle County, suppression is the specified State management objective (see Rule 4.8, Figure 4).
CE.	Except as specified in Part 4.7.3FH, elimination of all populations in Garfield County must be completed prior to seed development in 2008 for all land outside of the area defined by longitude 107°59.973’W, latitude 39°39.044’N, the eastern border of Garfield County, and the southern border of Garfield County.  For all other lands in Garfield County, suppression is the specified State management objective (see Rule 4.8, Figure 5).
 DF.	Except as specified in Part 4.7.3FH, elimination of all populations in Gunnison County must be completed prior to seed development in 2006 for all land within the Crystal River watershed.  Elimination of all other populations in Gunnison County must be completed prior to seed development in 2005 (see Rule 4.8, Figure 6).
EG.	Except as specified in Part 4.7.3FH, elimination of all populations in Pitkin County must be completed prior to seed development in 2008 for all land east of the Crystal River within the Crystal River watershed and in 2010 for all land west of the Crystal River within the Crystal River watershed.  For all other lands in Pitkin County, suppression is the specified State management objective (see Rule 4.8, Figure 7).
FH.	All populations in this state that are within 15 feet from the edge of any public road and any immediately adjacent area used for parking must be eliminated prior to seed development in 2005.
GI.	The prescribed integrated management techniques for the eradication of designated populations are limited to the use of herbicides approved by the Commissioner and hand-pulling, digging, or other mechanical techniques approved by the Commissioner.
HJ.	Prescribed integrated management techniques do not include the use of: (1) any biocontrol agents or; (2) any herbicides, cultural techniques, or mechanical techniques other than those approved by the Commissioner.
IK.	Seed longevity is unknown. Infested sites must be monitored for at least 10 years after the populations have been eliminated and treatments must be repeated when necessary to prevent flowering and development of seed.
4.7.4.	Spotted knapweed. In addition to the requirements set forth in this Part 4 for the management of all List B species, the following conditions also apply for spotted knapweed:
A.	Elimination of all populations is required prior to seed development in 2006 in all Colorado counties except for Clear Creek, La Plata, and Summit Countyies.
B.	Except as specified in Part 4.7.4D, elimination of all populations in Clear Creek and Summit Counties is required prior to seed development in 2008.
BC.	Except as specified in Part 47.4CD, elimination of all populations in La Plata County must be completed prior to seed development in 2006 for all land outside the boundaries of an area demarcated by State Highway 160 on the north, County Roads 141 and 136 on the east, a line drawn from East to West connecting County Road 136 where it joins State Highway 140 and the La Plata River, the La Plata River on the west from this line to its confluence with Cherry Creek, and Cherry Creek on the west until it meets State Highway 160.  For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 8).
CD.	All populations in this state that are within 15 feet from the edge of any public road and any immediately adjacent area used  for parking must be eliminated prior to seed development in 2005.
 DE.	The prescribed integrated management techniques for the eradication of disignated populations are limited to the use of herbicides approved by the Commissioner and hand-pulling, digging, or other mechanical techniques approved by the Commissioner.
EF.	Prescribed integrated management techniques do not include the use of: (1) any biocontrol agents or; (2) any herbicides, cultural techniques, or mechanical techniques other than those approved by the Commissioner.
FG.	Seed longevity is estimated to be at least fifteen years. Infested sites must be monitored for at least fifteen years after the populations have been eliminated and treatments must be repeated when necessary to prevent flowering and development of seed.
4.7.5.	Salt cedar. In addition to the requirements set forth in this Part 4 for the management of all List B species, the following conditions also apply for salt cedar:
A.	Elimination of all populations is required prior to seed development in 2006 in Alamosa, Conejos, Costilla, Jackson, Rio Grande, and Saguache Counties. 
B.	Except as otherwise specified in this plan, elimination of all populations in San Miguel and Montrose Counties must be completed prior to seed development in 2006 for all land within the watershed upstream from the confluence (38°12.327’N, 108°18.654’W) of Horsefly Creek and the San Miguel River (see Rule 4.7.68, Figure 9). 
C.	Elimination of all populations in Eagle, Garfield, Grand, Routt, and Summit Counties must be completed prior to seed development in 2007 for all land within the Colorado River watershed upstream from the point at which the Colorado River crosses the Eagle/Garfield County line (39°37.474’N, 107°06.762’W) (see Rule 4.8, Figure 10).
D.	Elimination of all populations within the Republican River watershed is required prior to seed development in 2010 for all land outside the boundaries of an area demarcated by County Road 7, Longitude 102° 7’29’’W, the southern boarder of Yuma County, and US Highway 385. For all land within these boundaries, supression is the specified State management objective (see Rule 4.8, Figure 100).
E.	Elimination of all populations in Weld County is required prior to seed development in 2010.
DF.	The prescribed integrated management techniques for the eradication of designated populations are limited to the use of herbicides approved by the Commissioner and hand-pulling, digging, sawing, or other mechanical techniques approved by the Commissioner.
EG.	Prescribed integrated management techniques do not include the use of: (1) any biocontrol agents or; (2) any herbicides, cultural techniques, or mechanical techniques other than those approved by the Commissioner.
FH.	Seed longevity is less than one year.
4.7.6.	Black henbane. In addition to the requirements set forth in this Part 4 for the management of all List B species, the following conditions also apply for black henbane:
A. 	Elimination of all populations is required prior to seed development in 2006 in all Colorado counties except for Grand, Larimer, Moffat, Rio Blanco, Routt and Saguache Counties.
B. 	Except as specified in Part 4.7.6GH, elimination of all populations in Grand County must be completed prior to seed development in 2006 for all land outside the boundaries of an area demarcated by Latitude 40° 11’05”N, Longitude 105° 48’29”W, Latitude 40° 03’41”N, and Longitude 106° 00’06”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 11).
C. 	Except as specified in Part 4.7.6 GH, elimination of all populations in Larimer County must be completed prior to seed development in 2006 for all land outside the boundaries of an area demarcated by County Road 80 on the north, Boxelder Creek and State Highway 1 on the east, and US Highway 287 on the south and west. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 12).
D.	Except as specified in Part 4.7.6 GH, elimination of all populations in Moffat County must be completed prior to seed development in 2006 for all land outside the boundaries of an area demarcated by US Highway 40 on the north, the eastern border of Moffat County, Williams Fork River on the south, and State Highway 13 on the west.  For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 13). 
E. 	Except as specified in Part 4.7.6 GH, elimination of all populations in Rio Blanco County must be completed prior to seed development in 2008 for all land outside the boundaries of an area demarcated by Latitude 39° 55’42”N, Dry Fork Piceance Creek and Longitude 108° 04’47”W on the east, Latitude 39° 52’31”N, and Piceance Creek on the west and of an area demarcated by Latitude 40° 03’44”N, Longitude 107° 37’36”W and Forest Service Road 245 on the east, Forest Service Road 243 on the south, and a line drawn from Forest Service Road 243 to Longitude 107° 41’37”W, and Longitude 107° 41’37”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 14).
F.	Except as specified in Part 4.7.6H, elimination of all populations in Routt County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by US Highway 40, County Road 53, County Highway 29, State Highway 317, and the western border of Routt County. For all land within these boundaries, supression is the specified State management objective (see Rule 4.8, Figure 101).
FG. 	Except as specified in Part 4.7.6 GH, elimination of all populations in Saguache County must be completed prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the County Border on the north, Longitude 106° 37’19”W to State Highway 114, State Highway 114 on the east until Longitude 105° 33’21”W, Longitude 105° 33’21”W, Latitude 38° 07’31”N, and Longitude 106° 48’37”W, and of an area demarcated by latitude 38 18’29”N Longitude 106 14’48”W, Latitude 38 03’56”N, and Longitude 106 22’33”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 15).
GH.	All populations in this state that are within 15 feet from the edge of any public road and any immediately adjacent area used for parking must be eliminated prior to seed development in 2006.
HI.	The prescribed integrated management techniques for the eradication of designated populations are limited to the use of herbicides approved by the Commissioner and hand-pulling, digging, or other mechanical techniques approved by the Commissioner.
IJ.	Prescribed integrated management techniques do not include the use of: (1) any biocontrol agents or; (2) any herbicides, cultural techniques, or mechanical techniques other than those approved by the Commissioner.
JK.	Seed longevity is estimated to be at least four years.  Infested sites must be monitored for at least four years after the populations have been eliminated and treatments must be repeated when necessary to prevent flowering and development of seed.
4.7.7.	Diffuse knapweed. In addition to the requirements set forth in this Part 4 for the management of all List B species, the following conditions also apply for diffuse knapweed:
A.	Elimination of all populations is required prior to seed development in 2006 in all Colorado counties except for Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver, Douglas, El Paso, Elbert, Garfield, Gilpin, Grand, Huerfano, Jefferson, Larimer, Las Animas, Logan, Moffat, Park, Pueblo, Rio Blanco, Summit, Washington and Weld Counties.
B.	Except as specified in Part 4.7.7V, elimination of all populations in Park County is required prior to seed development in 2007.
C.	Except as specified in Part 4.7.7V, elimination of all populations in Clear Creek, Gilpin, Logan, and Summit Counties is required prior to seed development in 2008.
D.	Except as specified in Part 4.7.7V, elimination of all populations in Grand County is required prior to seed development in 2009.
E.	Except as specified in Part 4.7.7.V, elimination of all populations in Washington County is required prior to seed development in 2011.
F.	Except as specified in Part 4.7.7V, suppression is the specified State management objective for all populations in Broomfield and Denver Counties.
BG.	Except as specified in Part 4.7.7V, elimination of all populations in Adams County must be completed prior to seed development in 2007 for all land outside the boundaries of an area demarcated by the northern border of Adams County, Longitude 108° 47’26”W, the southern border of Adams County, and the western border of Adams county and of an area demarcated by 88th Avenue on the north, Antelope Creek on the east, a line drawn from north to south connecting the beginning of Antelope Creek to the southern border of Adams County, the southern border of Adams county, and State Highway 79 on the west. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 16).
CH.	Except as specified in Part 4.7.7V, elimination of all populations in Arapahoe County must be completed prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern border of Arapahoe County, Kiowa Creek to the east, the southern border of Arapahoe County, and the western border of Arapahoe County and of an area demarcated by the northern border of Arapahoe County, Strasburg Road, Latitude 39° 42’31”N, and Wolf Creek. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 17).
DI.	Except as specified in Part 4.7.7V, elimination of all populations in Boulder County must be completed prior to seed development in 2006 for all land outside the boundaries of an area demarcated by the northern border of Boulder County, the eastern border of Boulder County, the southern border of Boulder County, and Longitude 105° 37’45”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 18).
E.	Except as specified in Part 4.7.7V, suppression is the specified State management objective for all populations in Broomfield and Denver Counties.
FJ.	Except as specified in Part 4.7.7V, elimination of all populations in Douglas County must be completed prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern border of Douglas County, the eastern border of Douglas County, the southern border of Douglas County, Rampart Road on the west until it meets State Highway 67, State Highway 67 to County Road 40, County Road 40 on the west, and the western border of Douglas County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 19).
GK.	Except as specified in Part 4.7.7V, elimination of all populations in El Paso County must be completed prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern border of El Paso County, North Calhan Highway and Calhan Highway on the east, a line that runs north to south connecting Calhan Highway to State Highway 94, Highway 94 to Curtis Road, Curtis Road and Chico Creek on the east, the southern border of El Paso County, Interstate 25 on the west until it transects Little Fountain Creek, Little Fountain Creek on the west, State Highway 115 and US Highway 24 on the west, and the western border of El Paso County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 20).
HL.	Except as specified in Part 4.7.7V, elimination of all populations in Elbert County must be completed prior to seed development in 2006 for all land outside the boundaries of an area demarcated by the northern border of Elbert County, Longitude 103 52’00” W, Latitude 39 07’42” N, and the western border of Elbert County.  For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 21).
IM.	Except as specified in Part 4.7.7V, elimination of all populations in Garfield County must be completed prior to seed development in 2008 for all land outside the boundaries of an area demarcated by Latitude 39° 37’38”N, Forest Service Road 602 on the east, a line drawn southwest connecting Forest Service Road 602 to State Highway 82, State Highway 82 on the east, the southern border of Garfield County, and Longitude 108° 28’14”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 22).
J.	Except as specified in Part 4.7.7V, elimination of all populations in Gilpin County must be completed prior to seed development in 2006 for all land outside the boundaries of an area demarcated by the northern border of Gilpin County, the eastern border of Gilpin County, and State Highway 119 on the west. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 23).
K.	Except as specified in Part 4.7.7V, elimination of all populations in Grand County must be completed prior to seed development in 2009.
LN.	Except as specified in Part 4.7.7V, elimination of all populations in Huerfano County must be completed prior to seed development in 2008 for all land outside the boundaries of an area demarcated by State Highway 160 on the north, Longitude 105° 59’40”W, Latitude 37° 25’54”N, and Longitude 105° 03’57”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 24).
MO.	Except as specified in Part 4.7.7V, elimination of all populations in Jefferson County must be completed prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern border of Jefferson County, the eastern border of Jefferson County, the North Fork of the South Platte River on the south, and the western border of Jefferson County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 25).
NP.	Except as specified in Part 4.7.7V, elimination of all populations in Larimer County must be completed prior to seed development in 2006 for all land outside the boundaries of an area demarcated by the North Fork of the Big Thompson River, Longitude 105° 03’25”W and the eastern border of Larimer County, the southern border of Larimer County, and Longitude 105° 37’45”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 26).
OQ.	Except as specified in Part 4.7.7V, elimination of all populations in Las Animas County must be completed prior to seed development in 2006 for all land outside the boundaries of an area demarcated by Latitude 37° 08’42”N, Longitude 104° 51’09”W, Latitude 37° 07’48”N, and Longitude 104° 49’59”W and of an area demarcated by the Van Bremer Arroyo, Longitude 104° 09’45”W, the Luning Arroyo, and State Highway 350. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 27).
PR.	Except as specified in Part 4.7.7V, elimination of all populations in Moffat County must be completed prior to seed development in 2006 for all land outside the boundaries of an area demarcated by US Highway 40 on the north, Longitude 107 30’19” W and 33 Road on the east, State Route 317 and State Highway 13 until it intersects with the Williams Fork River, Williams Fork River and the Yampa River on the south, and Longitude 107 44’01” W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 28).
Q.	Except as specified in Part 4.7.7V, elimination of all populations in Park County must be completed prior to seed development in 2007.
RS.	Except as specified in Part 4.7.7V, elimination of all populations in Pueblo County must be completed prior to seed development in 2006 for all land outside the boundaries of an area demarcated by Latitude 38° 00’32”N, the Huerfano River, the southern border of Pueblo County, Interstate 25 until it intersects the Greenhorn River, and the Greenhorn River. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 29).
ST.	Except as specified in Part 4.7.7V, elimination of all populations in Rio Blanco County must be completed prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern border of Rio Blanco County, County Road 15 on the east, and State Highway 13, and of an area demarcated by Latitude 40° 00’06”N, Longitude 108° 10’30”W, Latitude 39° 48’39”N and Longitude 108° 25’17”W.  For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 30).
T.	Except as specified in Part 4.7.7.V, elimination of all populations in Washington County must be completed prior to seed development in 2011.
U.	Except as specified in Part 4.7.7V, elimination of all populations in Weld County must be completed prior to seed development in 2008 for all land outside the boundaries of an area demarcated by the Little Thompson River on the north until it meets State Highway 60, State Highway 60 on the north, State Highway 60 and US Highway 85 on the east, the southern border of Weld County, and the western border of Weld County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 31).
V.	All populations in this state that are within 15 feet from the edge of any public road and any immediately adjacent area used for parking must be eliminated prior to seed development in 2006.
W.	The prescribed integrated management techniques for the eradication of designated populations are limited to the use of herbicides approved by the Commissioner and hand-pulling, digging, or other mechanical techniques approved by the Commissioner.
X.	Prescribed integrated management techniques do not include the use of: (1) any biocontrol agents or; (2) any herbicides, cultural techniques, or mechanical techniques other than those approved by the Commissioner.
Y.	Seed longevity is unknown. Infested sites must be monitored for at least 10 years after the populations have been eliminated and treatments must be repeated when necessary to prevent flowering and development of seed.
4.7.10	Houndstongue. In addition to the requirements set forth in this Part 4 for the management of all List B species, the following conditions also apply for houndstongue:
A. 	Elimination of all populations is required prior to seed development in 2009 in all Colorado counties except for Boulder, Costilla, Delta, Dolores, Eagle, Garfield, Grand, Gunnison, Huerfano, Jackson, Jefferson, La Plata, Larimer, Mesa, Montrose, Ouray, Pitkin, Pueblo, Rio Blanco, Routt, and San Miguel Counties.
B. 	Except as specified in Part 4.7.10P, elimination of all populations in Boulder County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern, eastern, and southern borders of Boulder County, and State Highways 72 and 7. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 69).
C. 	Except as specified in Part 4.7.10P, elimination of all populations in Costilla County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern and eastern borders of Costilla County, Latitude 37° 15’45”N to El Paso Creek, El Paso Creek on the south, Culebra Creek on the west until it intersects with State Highway 159, Highway 159 on the west to County Road X, County Road X to County Road 12, County Road 12 on the west to Road EE, Road EE west to Mountain View Road, Mountain View Road on the west, and US Highway 160 on the west. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 70).
D. 	Except as specified in Part 4.7.10P, elimination of all populations in Delta County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by Latitude 39° 7’28”N, the eastern border of Delta County, Latitude 39° 3’41”N, and Longitude 107° 33’48”W and of an area demarcated by the Smith Fork River, the eastern border of Delta County, Latitude 38° 41’14”N, and Longitude 107° 33’46”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 71).
E. 	Except as specified in Part 4.7.10P, elimination of all populations in Dolores County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern and eastern borders of Dolores County, Disappointment Creek, and Longitude 108° 20’14”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 72).
F. 	Except as specified in Part 4.7.10P, elimination of all populations in Grand County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern border of Grand County, State Highway 125, US Highway 40 and Longitude 105° 56’12”W on the east, and the southern and western borders of Grand County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 73).
G. 	Except as specified in Part 4.7.10P, elimination of all populations in Gunnison County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern border of Gunnison County, Longitude 107°15’1”W Anthracite Creek and Coal Creek on the south, and State Highway 133 on the west and of an area demarcated by the northern border of Gunnison County, Little Cimarron River, and the southern and western borders of Gunnison County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 74).
H. 	Except as specified in Part 4.7.10P, elimination of all populations in Huerfano County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern border of Huerfano County, Latitude 37° 52’25”N, Longitude 105° 22’25”W, Latitude 37° 41’17”N, Longitude 105° 3’48”W, Latitude 37° 26’22”N, and the southern and western borders of Huerfano County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 75).
I. 	Except as specified in Part 4.7.10P, elimination of all populations in Jackson County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern and eastern borders of Jackson County, Longitude 106° 11’23”W, Latitude 40° 52’33”N, and Longitude 106° 18’43”W and of an area demarcated by Latitude 40° 48’46”N, Longitude 106° 18’44”W, Latitude 40°45’3”N, and the North Platte River and of an area demarcated by Latitude 40° 45’2”N, Longitude 106° 14’57”W, the Michigan River, and State Highway 125 and of an area demarcated by Latitude 40° 33’46”N, Longitude 106° 22’31”W, Latitude 40° 30’3”N, and Grizzly Creek and of an area demarcated by Latitude 40° 41’15”N, Longitude 106° 33’45”W, Latitude 40° 37’35”N, and Longitude 106° 37’33”N and of an area demarcated by Latitude 40° 48’47”N, Longitude 106° 26’14”W, the North Platte River and Roaring Fork River on the south, Longitude 106° 30’1”N to the North Fork of the North Platte River, and the North Fork of the North Platte River on the west. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 76).
J. 	Except as specified in Part 4.7.10P, elimination of all populations in Larimer County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the North Fork of the Big Thompson River, Longitude 105° 16’58”W, the southern border of Larimer County, and the Rocky Mountain National Park boundary on the west. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 77).
K. 	Except as specified in Part 4.7.10P, elimination of all populations in Mesa County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern and eastern borders of Mesa County, Latitude 38° 56’5”N, Longitude 108° 18’47”W to US Interstate 70, US Interstate 70 to Latitude 39° 14’57”N, Latitude 39° 14’57”N, and Longitude 108° 41’15”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 78).
L. 	Except as specified in Part 4.7.10P, elimination of all populations in Montrose County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by US Highway 50, the eastern and southern borders of Montrose County, and US Highway 550 and by an area demarcated by Latitude 38° 19’55”N, the southern border of Montrose County, Naturita Creek, and Longitude 108° 30’0”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 79).
M. 	Except as specified in Part 4.7.10P, elimination of all populations in Pueblo County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the Saint Charles River, Longitude 104° 56’14”W, and State Highway 165. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 80).
N. 	Except as specified in Part 4.7.10P, elimination of all populations in San Miguel County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern and eastern borders of San Miguel County, State Highway 62, the San Miguel River to its confluence with Beaver Creek, Beaver Creek south until Latitude 37° 59’8”N, Latitude 37° 59’8”N, and Naturita Creek and of an area demarcated by State Highway 145, Forest Service Road 648, the eastern and southern borders of San Miguel County, and Longitude 107° 56’11”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 81).
O. 	Except as specified in Part 4.7.10P, suppression is the specified State management objective for all populations in Eagle, Garfield, Jefferson, La Plata, Ouray, Pitkin, Rio Blanco, and Routt Counties.
P.	All populations in this state that are within 15 feet from the edge of any public road and any immediately adjacent area used for parking must be eliminated prior to seed development in 2009.
Q.	The prescribed integrated management techniques for the eradication of designated populations are limited to the use of herbicides approved by the Commissioner and hand-pulling, digging, or other mechanical techniques approved by the Commissioner.
R.	Prescribed integrated management techniques do not include the use of: (1) any biocontrol agents or; (2) any herbicides, cultural techniques, or mechanical techniques other than those approved by the Commissioner.
S.	Seed longevity is estimated to be at least ten years. Infested sites must be monitored for at least ten years after the populations have been eliminated and treatments must be repeated when necessary to prevent flowering and development of seed.
4.7.11	Perennial pepperweed. In addition to the requirements set forth in this Part 4 for the management of all List B species, the following conditions also apply for perennial pepperweed:
A. 	Elimination of all populations is required prior to seed development in 2009 in all Colorado counties except for Adams, Alamosa, Boulder, Broomfield, Chaffee, Conejos, Costilla, Crowley, Garfield, Gunnison, Huerfano, Jefferson, Larimer, Logan, Moffat, Morgan, Pueblo, Rio Grande, Routt, Saguache, and Weld Counties. 
B. 	Except as specified in Part 4.7.11U, elimination of all populations in Adams County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern border of Adams County, Longitude 104° 48’34”W and Chambers Road on the east, and the southern and western borders of Adams County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 82).
C. 	Except as specified in Part 4.7.11U, elimination of all populations in Alamosa County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern border of Alamosa County, Longitude 105° 36’4”W, and the southern and western borders of Alamosa County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 83).
D. 	Except as specified in Part 4.7.11U, elimination of all populations in Boulder County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern, eastern, and southern borders of Boulder County, and State Highway 93 and US Highway 36 on the west. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 84).
E. 	Except as specified in Part 4.7.11U, elimination of all populations in Chaffee County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by Forest Service Road 255 on the north, a line drawn from northwest to southeast connecting Forest Service Road 255 to the Arkansas River, the Arkansas River, Longitude 105° 58’46”W, Latitude 38° 33’47”N, Longitude 105° 56’16”W, Latitude 38° 30’0”N, and Longitude 106° 7’31”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 85).
F. 	Except as specified in Part 4.7.11U, elimination of all populations in Costilla County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by Latitude 37° 29’55”N, Longitude 105° 18’48”W, Trinchera Creek on the east to Longitude 105°14’60”W, El Paso Creek and Culebra Creek on the south, State Highway 159, Latitude 37° 22’35”N, and Longitude 105° 29’55”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 86).
G. 	Except as specified in Part 4.7.11U, elimination of all populations in Crowley County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the Colorado Canal Corridor and the Bob Creek waterway between the western border of Crowley County and the northern and western shorelines of Lake Meredith with a buffer zone extending ½ mile outward from all waterway edges. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 87).
H. 	Except as specified in Part 4.7.11U, elimination of all populations in Gunnison County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by Latitude 39° 0’8”N, Longitude 107° 18’47”W, Latitude 38° 52’27”N, and the western border of Gunnison County and of an area demarcated by Latitude 38° 37’36”N, Longitude 106° 52’3”W, Latitude 38° 29’58”N, Longitude 107° 0’0”W, Latitude 38° 26’15”N, and Longitude 107° 3’47”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 88).
I. 	Except as specified in Part 4.7.11U, elimination of all populations in Huerfano County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the Huerfano River Watershed from its confluence with Muddy Creek upstream to the Huerfano River Headwaters and of an area demarcated by the Bear Creek Watershed from its confluence with the Cucharas River upstream to the Bear Creek Headwaters. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 89).
J. 	Except as specified in Part 4.7.11U, elimination of all populations in Jefferson County is required prior to seed development in 2009 for all land south of Forest Service Road 560, Forest Service Road 211, and 126 Road. For all other land within the County, suppression is the specified State management objective (see Rule 4.8, Figure 90).
K. 	Except as specified in Part 4.7.11U, elimination of all populations in Larimer County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by Latitude 40° 37’30”N, the eastern and southern borders of Larimer County, and Longitude 105° 7’36”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 91).
L. 	Except as specified in Part 4.7.11U, elimination of all populations in Logan County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by Cedar Creek on the north, Longitude 103° 15'3"W, North Sterling Canal on the south, and the eastern edge of North Sterling Reservoir and of an area demarcated by State Highway 138 on the north, Longitude 102° 38’23”W to Harmony Ditch, Harmony Ditch and the southern edge of Julesburg Reservoir on the north, the eastern border of Logan County, US Interstate 76, and the southern border of Logan County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 92).
M. 	Except as specified in Part 4.7.11U, elimination of all populations in Moffat County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by Latitude 40° 52’50”N, Longitude 108° 56’18”W, Latitude 40° 48’47”N, Longitude 108° 48’45”W, Latitude 40° 45’45”N, Longitude 108° 41’12”W, Latitude 40° 41’14”N, and the western border of Moffat County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 93).
N. 	Except as specified in Part 4.7.11U, elimination of all populations in Morgan County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the South Platte River corridor including the Fort Morgan Canal and the Sterling Canal from the eastern border of Morgan County upstream to the western border of Morgan County with a ½ mile buffer zone extending from all waterway edges. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 94).
O. 	Except as specified in Part 4.7.11U, elimination of all populations in Pueblo County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by the northern border of Pueblo County, Longitude 104° 33’35”W, US Highway 50, the eastern border of Pueblo County, Latitude 38° 3’44”N, Longitude 104° 7’27”W, Latitude 38° 7’37”N, Longitude 104° 18’49”W, Latitude 38° 11’25”N, the Saint Charles River, Longitude 104° 41’20”W, US Highway 50, and US Interstate 25. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 95).
P. 	Except as specified in Part 4.7.11U, elimination of all populations in Rio Grande County is required prior to seed development in 2009 for all land west of Longitude 106° 26’16”W. For all other land within the county, suppression is the specified State management objective (see Rule 4.8, Figure 96).
Q. 	Except as specified in Part 4.7.11U, elimination of all populations in Routt County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by Latitude 40° 33’45”N, Longitude 107° 7’29”W, Latitude 40° 29’59”N, and Longitude 107° 15’1”W and of an area demarcated by Latitude 40° 26’13”N, Longitude 107° 7’29”W, Latitude 40° 22’29”N, and Longitude 107° 11’11”W and of an area demarcated by Latitude 40° 26’20”N, Longitude 107° 18’44”W, Latitude 40° 22’32”N, and Longitude 107° 22’28”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 97).
R. 	Except as specified in Part 4.7.11U, elimination of all populations in Saguache County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by State Highway 114, US Highway 285, County Road GG, San Luis Creek, the southern border of Saguache County, Longitude 106° 22’29”W, Latitude 37° 52’33”N, and Longitude 106° 14’59”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 98).
S. 	Except as specified in Part 4.7.11U, elimination of all populations in Weld County is required prior to seed development in 2009 for all land outside the boundaries of an area demarcated by State Highway 392, State Highway 263, State Highway 37 until it intersects the South Platte River, the South Platte River on the north with a buffer zone extending ½ mile from its northern edge, the eastern border of Weld County, US Highway 34, US Highway 85, and the southern and western borders of Weld County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 99).
T. 	Except as specified in Part 4.7.11U, suppression is the State management objective for all populations in Broomfield, Conejos, and Garfield counties.
U.	All populations in this state that are within 15 feet from the edge of any public road and any immediately adjacent area used for parking must be eliminated prior to seed development in 2009.
V.	The prescribed integrated management techniques for the eradication of designated populations are limited to the use of herbicides approved by the Commissioner.
W.	Prescribed integrated management techniques do not include the use of: (1) any biocontrol agents or; (2) any herbicides, cultural techniques, or mechanical techniques other than those approved by the Commissioner.
X.	Seed longevity is estimated to be at least ten years. Infested sites must be monitored for at least ten years after the populations have been eliminated and treatments must be repeated when necessary to prevent flowering and development of seed.
4.8.	Figures 1 – 68101.

Part 7	Statements of Basis, Specific Statutory Authority and Purpose
7.4.	May 3, 2007 – Effective July 1, 2007
Statutory Authority
These amendments to the rules are adopted by the Commissioner of Agriculture pursuant to his authority under the Colorado Noxious Weed Act, §§ 35-5.5-108 and 115, C.R.S. (2005).
Purpose
The purposes of these amendments to the rules are to: (1) develop and implement state noxious weed management plans for selected List B species, (2) revise existing state noxious weed management plans for selected List B species, and (3) identify priority List B species, among other possible List B species, for which the Commissioner intends to develop and implement state noxious weed management plans.
Factual Basis
The factual and policy issues encountered in the proposal of these amendments to the rules are as follows:
1.	The current rules pertaining to the administration and enforcement of the Colorado Noxious Weed Act state that the Commissioner will develop and implement state noxious weed management plans for selected List B species.
2.	State noxious weed management plans are necessary in order to coordinate appropriate actions at the private, local, state, and federal levels that will halt the continued spread of these List B species.
3.	The proposed plans have been developed in consultation with the state noxious weed advisory committee, local governments, and other interested parties.
4.	To maintain the effectiveness of implemented plans, it will be necessary to modify periodically containment boundaries and dates identified for elimination of populations designated for eradication.