DEPARTMENT OF AGRICULTURE
Conservation Services Division
RULES PERTAINING TO THE ADMINISTRATION AND ENFORCEMENT OF THE COLORADO NOXIOUS WEED ACT
8 CCR 1206-2
Part 4	List B Noxious Weed Species
4.1.	List B of the Colorado noxious weed list comprises the following noxious weed species:
Absinth wormwood (Artemisia absinthium)
Black henbane (Hyoscyamus niger)
Bouncingbet (Saponaria officinalis)
Bull thistle (Cirsium vulgare)
Canada thistle (Cirsium arvense)
Chinese clematis (Clematis orientalis)
Common tansy (Tanacetum vulgare)
Common teasel (Dipsacus fullonum)
Corn chamomile (Anthemis arvensis)
Cutleaf teasel (Dipsacus laciniatus)
Dalmatian toadflax, broad-leaved (Linaria dalmatica)
Dalmatian toadflax, narrow-leaved (Linaria genistifolia)
Dame's rocket (Hesperis matronalis)
Diffuse knapweed (Centaurea diffusa)
Eurasian watermilfoil (Myriophyllum spicatum)
Hoary cress (Cardaria draba)
Houndstongue (Cynoglossum officinale)
Jointed goatgrass (Aegilops cylindrica)
Leafy spurge (Euphorbia esula)
Mayweed chamomile (Anthemis cotula)
Moth mullein (Verbascum blattaria)
Musk thistle (Carduus nutans)
Oxeye daisy (Chrysanthemum leucanthemum)
Perennial pepperweed (Lepidium latifolium)
Plumeless thistle (Carduus acanthoides)
Quackgrass (Elytrigia repens)
Redstem filaree (Erodium cicutarium)
Russian knapweed (Acroptilon repens)
Russian-olive (Elaeagnus angustifolia)
Salt cedar (Tamarix chinensis, T. 	 parviflora, and T. ramosissima)
Scentless chamomile (Matricaria perforata)
Scotch thistle (Onopordum acanthium)
Scotch thistle (Onopordum tauricum)
Spotted knapweed (Centaurea maculosa)
Spurred anoda (Anoda cristata)
Sulfur cinquefoil (Potentilla recta)
Venice mallow (Hibiscus trionum)
Wild caraway (Carum carvi)
Yellow nutsedge (Cyperus esculentus)
Yellow toadflax (Linaria vulgaris)
4.2.	List B noxious weed species are species for which the Commissioner, in consultation with the state noxious weed advisory committee, local governments, and other interested parties, develops and implements state noxious weed management plans designed to stop the continued spread of these species. List B species must be managed in accordance with all the provisions of this Part 4, including any applicable state noxious weed management plans. Until a plan for a particular species is developed and implemented by rule, all persons are recommended to manage that 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, salt cedar, spurred anoda, Venice mallow, and yellow nutsedge Eurasian watermilfoil, hoary cress, Russian knapweed, and sulfur cinquefoil 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 2008-2009designed to stop the continued spread of these species. State noxious weed management plans for additional List B species will be developed in future years.
4.4.	It is a violation of these rules to allow any plant of any population of a List B species designated for eradication by the Commissioner in a state noxious weed management plan (Rules 4.7.1-4.7.9) to produce seed or develop other reproductive propagules after the time specified in the plan for elimination.
4.5.	Prescribed management techniques must be applied to every population of List B species designated for eradication by the Commissioner in a state noxious weed management plan (Rules 4.7.1-4.7.9) to achieve the following objectives:
A.	The plants of every population of List B species designated for eradication must be eliminated prior to seed development in the year specified.
B.	Any population that is discovered in areas designated for eradication subsequent to the year specified for elimination must be eliminated prior to the development of viable seed. If the population is discovered after seed development has occurred, then efforts must be made to minimize the dispersion of seed and elimination is required prior to seed development in the following year.
C.	Once all plants are eliminated, appropriate efforts must be made in subsequent years to detect and eliminate new plants arising from seed, reproductive propagule, or root stock prior to seed development for the duration of the seed longevity for the particular species.
D.	In order to ensure that seeds or other reproductive propagules are not produced or spread, any plant with flowers, seeds, or other reproductive propagules must be placed in sealed plastic bags and disposed of by:
1.	high intensity burning in a controlled environment that completely destroys seed viability;
2.	removal of plant materials to a solid waste landfill which covers refuse daily with six inches of soil or alternative material; or
3.	any other method approved by the Commissioner.
4.6.	Within one year of detection, any local governing body with a population of any List B species for which the Commissioner has developed and implemented a state noxious weed management plan must provide to the State Weed Coordinator mapping data pertinent to distribution and abundance of such species in a form prescribed by the State Weed Coordinator.
4.7.	State Noxious Weed Management Plans for List B Noxious Weed Species
4.7.2.	Chinese clematis (Clematis orientalis). 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 4.7.2H and in Part 4.7.2I, elimination of all populations in Clear Creek County must be completed prior to seed development in 2008 2010.
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 4.7.2.H and in Part 4.7.2I, elimination of all populations in Garfield County is required prior to seed development in 2010.
E.	Except as specified in Part 4.7.2H and in Part 4.7.2I, 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).
F.	Except as specified in Part 4.7.2H and in Part 4.7.2I, elimination of all populations in Jefferson County must be completed prior to seed development in 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 2009 unless otherwise specified in this plan (see Rule 4.8, Figure 3).
G.	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.
H.	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.
I.	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.
J.	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.
K.	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.
L.	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 (Carduus acanthoides). 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, 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.
D.	Except as specified in Part 4.7.3H, 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).
E.	Except as specified in Part 4.7.3H, 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).
F.	Except as specified in Part 4.7.3H, 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).
G.	Except as specified in Part 4.7.3H, elimination of all populations in Pitkin County must be completed prior to seed development in 2008 2010 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).
H.	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.
I.	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.
J.	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.
K.	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.
4.7.5.	Salt cedar (Tamarix chinensis, T. parviflora, and T. ramosissima). 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.	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 4.8, 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.
F.	Elimination of all populations in Chaffee and Routt Counties.is required prior to seed development in 2011.
G.	Elimination of all populations in Montrose County must be completed prior to seed development in 2011 for all land within the watershed upstream from the intersection of State Highway 90 and the San Miguel River to the confluence of Horsefly Creek and the San Miguel River. (see Rule 4.8, Figure 147). 
H.	Elimination of all populations in San Miguel County must be completed prior to seed development in 2011 for all land within the Naturita Creek watershed from the headwaters to the point at which the Naturita Creek crosses the San Miguel/Montrose County line. (see Rule 4.8, Figure 148).
F. I	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.
G. J	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.
H. K	Seed longevity is less than one year.
4.7.12 	Dalmatian toadflax (Linaria dalmatica and Linaria genistifolia). 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 Dalmatian toadflax: 		
A. 	Elimination of all populations is required prior to seed development in 2011 in all Colorado counties except for Adams, Arapahoe, Boulder, Broomfield, Chaffee, Dolores, Douglas, Eagle, Garfield, La Plata, Lake, Larimer, Mesa, Moffat, Routt, Summit, and Weld Counties.
B.	Except as specified in Part 4.7.12T, elimination of all populations in Adams County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern border of Adams County, US Highway 85, Interstate 76, Interstate 25, 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 102).
C.	Except as specified in Part 4.7.12T, elimination of all populations in Arapahoe County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by East Belleview Avenue, the northern edge of Cherry Creek Lake, East Quincy Avenue, Toll Road C470 on the east, the southern border of Arapahoe County, and South Yosemite Street on the west. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 103).
D.	Except as specified in Part 4.7.12T, elimination of all populations in Boulder County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern, eastern, and southern borders of Boulder County, and Longitude 105°22’33”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 104).
E.	Except as specified in Part 4.7.12T, elimination of all populations in Broomfield County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by 160th Ave, and the eastern, southern, and western borders of Broomfield County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 105).
F.	Except as specified in Part 4.7.12T, elimination of all populations in Chaffee County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Latitude 38°52’30”N, the Arkansas River, Latitude 38°41’10”N, and Longitude 106°15’4”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 106).
G.	Except as specified in Part 4.7.12T, elimination of all populations in Dolores County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern border of Dolores County, the Dolores River, the southern border of Dolores County and Latitude 37°37’53”N, and the western border of Dolores County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 107).
H.	Except as specified in Part 4.7.12T, elimination of all populations in Douglas County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern border of Douglas County, Colorado Boulevard, County Hwy 36, Latitude 39°29’57”N, and the western border of Douglas County and of an area demarcated by East Parker Road, the eastern border of Douglas County, Singing Hills Road, North Flintwood Road, South Pinery Parkway and East Democrat Road, and State Highway 83. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 108).
I.	Except as specified in Part 4.7.12T, elimination of all populations in Eagle County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Latitude 39°45’1”N, the eastern border of Eagle County, Latitude 39°26’2”N, Longitude 106°26’19”W, Latitude 39°33’39”N, and the eastern border of Eagle County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 109).
J.	Except as specified in Part 4.7.12T, elimination of all populations in Garfield County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Latitude 39°37’30”W, Longitude 107°19’51”W, the Roaring Fork River, Latitude 39°26”7”N until the East Divide Creek on the south, the Divide Creek, and Longitude 107°37’16”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 110).
K.	Except as specified in Part 4.7.12T, elimination of all populations in La Plata County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Latitude 37°18’44”N, Longitude 108°0’2”W, Latitude 37°15’2”N, and Longitude 108°3’43”W and of an area demarcated by County Highway 240, the Florida River, and US Highway 160. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 111).
L.	Except as specified in Part 4.7.12T, elimination of all populations in Lake County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by State Highway 91, Longitude 106°14’60”W, and County Road 3. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 112).
M.	Except as specified in Part 4.7.12T, elimination of all populations in Larimer County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern, eastern, and southern borders of Larimer County, the Rocky Mountain National Park Boundary on the west, and Longitude 105°37’31”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 113).
N.	Except as specified in Part 4.7.12T, elimination of all populations in Mesa County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by State Highway 330, 58 ½ Road, 59 Road, Forest Service Road 121, Latitude 39°3’36”N, and Longitude 108°11’16”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 114).
O.	Except as specified in Part 4.7.12T, elimination of all populations in Moffat County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the Big Gulch, Latitude 40°37’26”N, the eastern and southern borders of Moffat County, County Highway 51, and State Highway 17. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 115).
P.	Except as specified in Part 4.7.12T, elimination of all populations in Routt County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Latitude 40°37’26”N, Longitude 106°59’17”W until it intersects with Trout Creek, Trout Creek on the east until the confluence with Fish Creek, Fish Creek on the east, and the southern and western borders of Routt County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 116).
Q.	Except as specified in Part 4.7.12T, elimination of all populations in Summit County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Latitude 39°40’57”N, Longitude 105°56’12”W, Latitude 39°33’47”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 117).
R.	Except as specified in Part 4.7.12T, elimination of all populations in Weld County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern border of Weld County, Longitude 104°37’27”W, Latitude 40°52’17”N, 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 118).
S.	Except as specified in Part 4.7.12T, suppression is the specified State management objective for all populations in Denver and Jefferson Counties.
T.	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 2011.
U.	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.
V.	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.
W.	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.
4.7.13	Leafy spurge (Euphorbia esula). 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 leafy spurge:
A.	Elimination of all populations is required prior to seed development in 2011 in all Colorado counties except for Adams, Arapahoe, Archuleta, Boulder, Custer, Delta, Dolores, El Paso, Fremont, Garfield, Grand, Huerfano, La Plata, Larimer, Logan, Moffat, Morgan, Ouray, Park, Pitkin, Pueblo, Rio Blanco, Routt, Saguache, Sedgwick, Summit, Teller, and Weld Counties.
B.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Adams County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern border of Adams County, Himalaya Street, East 152nd Avenue, Picadilly Road, 128th Avenue, Tower Road, and the southern and western borders of Adams County and of an area demarcated by East 88th Avenue, Kiowa Creek, and the southern border of Adams County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 119).
C.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Arapahoe County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern border of Arapahoe County, Kiowa Creek, and the southern and western borders of Arapahoe County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 120).
D.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Archuleta County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by West US Highway 160, US Highway 84, and Latitude 37°15’1”N. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 121).
E.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Boulder County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern, eastern, and southern borders of Boulder County and State Highway 72 and State Highway 7 on the west. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 122).
F.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Custer County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Forest Service Road 160, Hermit Road, Longitude 105°29’12”W, Latitude 38°1’13”N, and the western border of Custer County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 123).
G.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Delta County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by State Highway 133, the eastern border of Delta County, and Latitude 38°48’46”N. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 124).
H. 	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Dolores County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Latitude 37°48”44”N, Longitude 108°33’47”W, Latitude 37°41’9”N, and Longitude 108°41’18”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 125).
I.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in El Paso County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern border of El Paso County, Longitude 104°39’38”W, Latitude 39°3’42”W, and the western border of El Paso County and of an area demarcated by US Highway 24, the northern and eastern borders of El Paso County, and Harrisville Road. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 126).
J.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Fremont County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern border of Fremont County, State Highway 9, State Highway 2, and Longitude 105°37’29”W and of an area demarcated by the Tallahassee Creek Watershed from the headwaters downstream until the confluence of Tallahassee Creek with the Arkansas River. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 127).
K. 	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Garfield County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Interstate 70, Longitude 108°3’45”W, and the southern border of Garfield County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 128).
L.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Grand County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the Colorado River until it intersects with US Highway 40, US Highway 40 on the east, Forest Service Road 139, the Williams Fork River, the eastern edge of Williams Fork Reservoir, and the Williams Fork River. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 129).
M.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Huerfano County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Latitude 37°52’29”N, Forest Service Road 630, State Highway 69, and Forest Service Road 634 and of an area demarcated by US Highway 160, Longitude 104°56’25”W, County Highway 350, State Highway 12, Forest Service Road 421, and Longitude 105°7’32”W and of an area demarcated by Latitude 37°45’1”N, Highway 550, Highway 570, Highway 572, Latitude 37°41’16”N, and Longitude 105°18’45”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 130).
N. 	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in La Plata County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the Cherry Creek and La Plata River watershed downstream from the headwaters of each until the confluence of the La Plata River with Long Hollow. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 131).
O.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Larimer County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern, eastern and southern border of Larimer County, the Rocky Mountain National Park boundary on the west, and Longitude 105°41’13”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 132).
P.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Logan County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by North Sterling Canal, Pawnee Creek, Highway 138, the eastern border of Logan County, 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 133).
Q. 	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Moffat County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern border of Moffat County, Longitude 107°51”22”W, Latitude 40°56’18”N, Longitude and 108°0’3”W, and of an area demarcated by the northern border of Moffat County, Longitude 107°26’16”W, Latitude 40°41’18”N, the eastern border of Moffat County, the Williams Fork River, Mariposa Creek, the southern border of Moffat County, County Highway 51, State Highway 17, US Highway 40, County Road 193, State Highway 13, Latitude 40°41’18”N, Longitude 107°33’45”W, and State Highway 13 on the west and of an area demarcated by Latitude 40°33’47”N, Longitude 108°37’32”W, Latitude 40°29’59”N, and Longitude 108°41’17”W and of an area demarcated by State Highway 318, Longitude 108°59’54”W, 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 134).
R. 	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Morgan County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the Riverside Canal on the north, Latitude 40°24’21”N, the eastern border of Morgan County, the Lower Platte and Beaver Ditch on the south, the Fort Morgan Canal, Bijou Creek, Bijou Canal, and the western border of Morgan County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 135).
S. 	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Ouray County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Dallas Creek on the north, Longitude 107°44’57”W, Latitude 38°3’45”N, and Dallas Creek on the west. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 136).
T. 	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Park County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Latitude 38°56’13”N, Bike Mountain Road, State Highway 98, and Longitude 102°26’15”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 137).
U.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Pitkin County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern border of Pitkin County, Longitude 106°45’1”W, Latitude 39°9’57”N, Capitol Creek, and State Highway 82.. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 138).
V.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Pueblo County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Latitude 38°11’21”N, Longitude 104°52’22”W, and the southern and western border of Pueblo County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 139).
W.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Rio Blanco County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by the northern border of Rio Blanco County, Longitude107°33’40”W, Latitude 39°56’11”N, Flag Creek, Latitude 39°59’59”N, County Highway 5, Latitude 40°3’39”N, and Longitude 105°52’31”W . For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 140).
X.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Routt County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Latitude 40°41’18”N, Longitude 107’11”11”W, County Road 29 until it intersects with the East Fork of the Williams Fork River, the East Fork of the Williams Fork River on the south, and the western border of Routt County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 141).
Y.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Saguache County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by County Road GG, County Road 65, County Road DD, County Road 64, County Road CC, County Road 62, County Road AA, and the San Luis Creek and of an area demarcated by Latitude 38°7’29”N, Longitude 106°7’28”W, Latitude 38°3’32”N, and Longitude 106°11’13”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 142).
Z.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Sedgwick County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Highway 138 until it intersects with the county border, the northern border of Sedgwick County, Interstate 76, and the western border of Sedgwick County. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 143).
AA.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Summit County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Latitude 39°41’15”N, Longitude 105°59’60”W, Latitude 39°30’0”N, and Longitude 106°7’30”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 144).
AB.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Teller County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by Latitude 39°0’2”N, Longitude 105°7’32”W, US Highway 24, and Longitude 105°15’1”W. For all land within these boundaries, suppression is the specified State management objective (see Rule 4.8, Figure 145).
AC.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, elimination of all populations in Weld County is required prior to seed development in 2011 for all land outside the boundaries of an area demarcated by County Highway Road 100, US Highway 85 until it intersects with Highway 64, Highway 64 and County Road 64, Crow Creek, the South Platte River Watershed from the convergence with Crow Creek until the eastern border of Weld County, 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 146).
AD.	Except as specified in Part 4.7.13AE and in Part 4.7.13AF, suppression is the specified State management objective for all populations in Broomfield, Denver, Douglas, and Jefferson. 
AE.	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 2011. 
AF.	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 2011. 
AG.	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.
AH.	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.
AI.	Seed longevity is estimated to be at least 8 years. Infested sites must be monitored for at least 8 years after the populations have been eliminated and treatments must be repeated when necessary to prevent flowering and development of seed.
4.7.14	Spurred anoda (Anoda cristata). 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 Spurred anoda:
A. 	Elimination of all populations is required prior to seed development in 2011 in Moffat County.
B.	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.
C.	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.
D.	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.
4.7.15 	Venice mallow (Hibiscus trionum). 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 Venice Mallow:
A. 	Elimination of all populations is required prior to seed development in 2011 in Fremont and Larimer Counties.
B.	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.
C.	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.
D.	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.
4.8.	Figures 1 – 101 148.
		(Figures 102 – 148 (Maps) are attached in a separate file.)
Part 7	Statements of Basis, Specific Statutory Authority and Purpose
7.5.	August 12, 2008 – Effective September 30, 2008
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. (2007).
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; (3) reclassify two of the currently listed noxious weeds to different categories; and (4) 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 and Policy Issues
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.