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State Declared Noxious Weeds
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Priority 1A
PRIORITY 1A weeds are not present in Montana or have a limited presence. Management criteria will require prevention, education, and eradication if detected.
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Priority 1B
Priority 1B weeds have limited presence in Montana. Management criteria will require eradication or containment, where present, and prevention and education elsewhere.
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Priority 2A
Priority 2A weeds are common in isolated areas of Montana. Management criteria will require containment and suppression where common, and eradication or containment, prevention, and education where less abundant. Management shall be prioritized by local weed districts.
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Priority 2B
Priority 2B weeds are abundant in Montana and widespread in many counties. Management criteria will require containment and suppression where abundant and widespread, and eradication or containment, prevention and education where less abundant. Management shall be prioritized by local weed districts.
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Priority 3
Priority 3 weeds are NOT noxious weeds, but regulated plants that have potential for significant negative economic and ecological impact. Intentional spread or sale of regulated plants other than as a contaminant in agricultural products is prohibited. Research, education, prevention, and control programs, where appropriate, are recommended to minimize the spread of these weeds. Control of Priority 3 weeds is not mandated.
Madison County Weed List
| Noxious Weed Species Common Name |
Scientific Name |
|---|---|
| Field Scabious |
Knautia arvensis |
| Musk Thistle |
Carduus nutans |