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State and Province Noxious Weed Lists


Alaska  |   Alberta  |   Arizona  |   British Columbia  |   California  |   Colorado  |   Hawaii  |   Idaho  |   Kansas  |   Minnesota  |   Montana  |   Nebraska  |   Nevada  |  New Mexico  |   North Dakota  |   Oregon  |   Saskatchewan   |  
South Dakota   |   Utah  |   Washington  |   Wyoming


Alaska

Updated: 2011
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Prohibited: The following are prohibited noxious weeds.


Restricted: The following are restricted noxious weeds in Alaska.



Alberta

Updated: 2010
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Prohibited Noxious Weeds: Species that are not established in Alberta, but have demonstrated detrimental effects in other provinces or states. The objective of identifying them is to prevent them from becoming established in the province.


Noxious weeds: Species that are widely spread in various areas of the province, but can still pose a significant economic hardship once established. Controlling the spread of noxious weeds is critical to protecting areas that are not infested.


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Arizona

Updated: 2010
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Prohibited: The following noxious weeds (includes plants, stolons, rhizomes, cuttings, and seed) are prohibited from entry into the state.


Regulated: The following noxious weeds are regulated (includes plants, stolons, rhizomes, cuttings, and seed) and, if found within the state, may be controlled or quarantined to prevent further infestation or contamination.


Restricted: The following noxious weeds are restricted (includes plants, stolons, rhizomes, cuttings, and seed) and, if found within the state, shall be quarantined to prevent further infestation or contamination.


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British Columbia

Updated: 2011
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Noxious Weeds (Provincial):


Noxious Weeds (Regional):


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California

Updated: 2010
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Noxious Weeds:


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Colorado

Updated: 2011
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List A: Species in Colorado that are designated by the Commissioner for eradication.


List B: 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 C: Weed species are species for which the Commissioner, in consultation with the state noxious weed advisory committee, local governments, and other interested parties, will develop and implement state noxious weed management plans designed to support the efforts of local governing bodies to facilitate more effective integrated weed management on private and public lands. The goal of such plans will not be to stop the continued spread of these species but to provide additional education, research, and biological control resources to jurisdictions that choose to require management of List C species.


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Hawaii

Updated: 1992
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List of Plant Species Designated as Noxious Weeds for Eradication or Control Purposes by the Hawaii Department of Agriculture, June 18, 1992.


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Idaho

Updated: 2011
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Idaho has 64 different species of weeds which are designated noxious by state law. These weeds are designated into three levels of concern. The spread of these weeds and the damage they do to Idaho agriculture can be lessened through proper identification and handling.

Statewide EDRR List:


Statewide Control List:


Statewide Containment List:



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Kansas

Updated: 2007
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Noxious Weeds: In Kansas, it is the duty of anyone who owns or supervises land "to control the spread of and to eradicate" all noxious weeds.


In addition, any county may declare one or both of the following species "noxious" within the county and state statutes regarding control and eradiation will apply:


Quarantined Plant Pests: Organisms that are not native to Kansas and the United States. These organisms are considered high-risk threats to Kansas agriculture and environment. Quarantine action is intended to reduce the risk of these organisms becoming established and/or widespread in the state.


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Minnesota

Updated: 2009
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State prohibited noxious weeds: The plants listed are prohibited noxious weeds because they are injurious to public health, the environment, public roads, crops, livestock, and other property. Prohibited noxious weeds must be controlled or eradicated as required in Minnesota statutes, section 18.78.


Restricted Noxious Weeds: These plants listed are restricted noxious weeds whose only feasible means of control is to prohibit the importation, sale, and transportation of them or their propagating parts in the state except as provided by Minnesota Statutes, section 18.82.


Secondary Noxious Weeds: These weeds may be added to a county prohibited or restricted list by following the process in part 1505.0750.


Early Detection Species that the Minnesota Department of Agriculture has identified as “target species” in its early detection efforts.


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Montana

Updated: 2010
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Priority 1a: These weeds are not present in Montana. Management criteria will require eradication, and education and prevention efforts if detected.


Priority 1b: These weeds have limited presence in Montana. Management criteria will require eradication or containment and education.


Priority 2a: These weeds are common in isolated areas of Montana. Management criteria will require eradication or containment where less abundant. Management shall be prioritized by local weed districts.


Priority 2b: These weeds are abundant in Montana and widespread in many countries. Management criteria will require eradication or containment where less abundant. Management shall be prioritized by local weed districts.


Priority 3: Regulated Plants (not Montana listed noxious weeds) have the potential to cause significant negative impacts. The plant may not be intentionally spread or sold other than as a contaminant in agricultural products. The state recommends research, education, and prevention to minimize the spread of the regulated plant.


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Nebraska

Updated: 2009
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Noxious weeds:


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Nevada

Updated: 2011
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Category A: Weeds not found or limited in distribution throughout the state; actively excluded from the state and actively eradicated wherever found; actively eradicated from nursery stock dealer premises; control required by the state in all infestations.


Category B: Weeds established in scattered populations in some counties of the state; actively excluded where possible, actively eradicated from nursery stock dealer premises; control required by the state in areas where populations are not well established or previously unknown to occur.


Category C: Weeds currently established and generally widespread in many counties of the state; actively eradicated from nursery stock dealer premises; abatement at the discretion of the state quarantine officer.


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New Mexico

Updated: 2009
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Class A: Species are currently not present in New Mexico, or have limited distribution. Preventing new infestations of these species and eradicating existing infestations is the highest priority.


Class B: Species are limited to portions of the state. In areas with severe infestations, management should be designed to contain the infestation and stop any further spread.


Class C: Species are wide-spread in the state. Management decisions for these species should be determined at the local level, based on feasibility of control and level of infestation.


Watch List: These species are of concern in the state and have the potential to become problematic. More data is needed to determine if these species should be listed; when these species are encountered please document their location and contact appropriate authorities.


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North Dakota

Updated: 2011
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Noxious Weeds: Weeds declared "noxious" are those that are difficult to control, easily spread, and injurious to public health, crops, livestock, land, or other property.


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Oregon

Updated: 2010
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“A” Designated Weeds: Weeds of known economic importance which occur in the state in small enough infestations to make eradication or containment possible; or are not known to occur, but their presence in neighboring states make future occurrences in Oregon seem imminent. Recommended action: infestations are subject to eradication or intensive control when and where found.


“B” Designated Weeds: Weeds of economic importance which are regionally abundant, but which may have limited distribution in some counties. Recommended action: limited to intensive control at the state, county or regional level as determined on a site specific, case-by-case basis. Where implementation of a fully integrated statewide management plan is not feasible, biological control (when available) shall be the primary control method.


“T” Designated Weeds: Priority noxious weed designated by the Oregon State Weed Board as a target for which the ODA will develop and implement a statewide management plan. “T” designated noxious weeds are species selected from either the “A” or “B” list.


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Saskatchewan

Updated: 2010
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Schedule 1 (Prohibited Weeds):


Schedule II (Noxious Weeds):


Schedule III (Nuisance Weeds):


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South Dakota

Updated: 2011
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State Noxious Weeds: Those weeds which the South Dakota Weed and Pest Commission has designated as sufficiently detrimental to the state to warrant enforcement of control measures.


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Utah

Updated: 2010
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Class A: "Early Detection and Rapid Response (EDRR)" declared noxious weeds are those that are not native to the state of Utah, pose a serious threat to the state, and should be considered a very high priority.


Class B: "Control" declared noxious weeds are not native to the state of Utah, pose a threat to the state, and should be considered a high priority for control.


Class C: "Containment" declared noxious weeds are not native to the state of Utah and are widely spread, but pose a threat to the agricultural industry and agricultural products, and the focus is on stopping expansion.


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Washington

Updated: 2011
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Class A Weeds: Non-native species whose distribution in Washington is still limited. Preventing new infestations and eradicating existing infestations are the highest priority. Eradication of all Class A plants is required by law.


Class B Weeds: Non-native species presently limited to portions of the State. Species are designated for control in regions where they are not yet widespread. Preventing new infestations in these areas is a high priority. In regions where a Class B species is already abundant, control is decided at the local level, with containment as the primary goal. Please contact your County Noxious Weed Control Coordinator to learn which species are designated in your area.


Class C Weeds: Noxious weeds which are already widespread in Washington or are of special interest to the state’s agricultural industry. Class C status allows counties to enforce control if locally desired. Other counties may choose to provide education or technical consultation.


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Wyoming

Updated: 2010
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Department of Land Resources of Environmental Sciences, Montana State University, Bozeman, Montana