Noxious Weed Control District Advisory Board
Noxious Weed Control District Advisory Board -
Noxious weeds are a danger to our environment and the economy. These introduced species cause a reductions in agricultural production, environmental degradation and added maintenance costs. Once invasive plants spread to natural areas, they harm native plants and wildlife and can be impossible to eradicate.
“Noxious weed” - a terrestrial, aquatic or marine plant designated by the Coos County Weed Control District Advisory Board as among those representing the greatest public menace and as a top priority for action by weed control programs.
Noxious weeds have become so thoroughly established and are spreading so rapidly on private, state, county, and federally owned lands, that they have been declared to be a menace to public welfare. Steps leading to eradication, where possible, and intensive control are necessary. It is further recognized that the responsibility for eradication and intensive control rests not only on the private landowner and operator, but also on the city, county, state, and federal governments.
Weed Classification System
The purpose of this Classification System is to:
1. Act as the Coos County Weed Control District’s official guideline for prioritizing and implementing noxious weed control projects.
2. Assist the District in the distribution of available funds through programs such as the herbicide cost-share, Early Detection Rapid Response (EDRR), education and outreach, and training.
3. Aid in setting effective noxious weed control strategies.
“A” designated weed – a weed of known economic importance which occurs in the county in small enough infestations to make eradication/containment possible; or is not known to occur, but its presence in neighboring counties make future occurrence in Coos County seem imminent.
Priority: Infestations are subject to eradication or intensive control when and where found.
“B” designated weed – a weed of economic importance which is abundant in parts of the county, but which may have limited distribution in some areas.
Priority: 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.
“C” designated weed- a weed of concern for Coos County. This list is for educational purposes only. This category is set up for weeds that need to be the focus for education and outreach. These may not be on the list for cost-share program but are important for understand identification and control methods available.
“T” designated weed – Species from either the A or B lists that are targeted (T) to be the focus for prevention and control within the county. T-designated noxious weeds are determined by the Board and are the focus of the herbicide cost-share program.
Common Name - Scientific Name
Biddy biddy (T) - Acaena novae-zelandiae
Blackberry, Himalayan (T)-Rubus bifrons (R. armeniacus, discolor)
Broom, French (T) - Genista monspessulana
Broom, Scotch (T)- Cytisus scoparius
Gorse (T) - Ulex europaeus
Ivy, English and Atlantic ivy (all cultivars) (T) - Hedera helix, H. hibernica
Jubata Grass (purple pampas grass) (T) Cortaderia jubata
Knapweed Diffuse (T) - Centaurea diffusa and Knapweed, Meadow (T) - Centaurea moncktonii
Knotweed, Bohemian (T) - Polygonum bohemica, Knotweed, Giant (T) - Polygonum sachalinesis (Fallopia sachalinesis),
Knotweed, Himalayan (T)- Polygonum polystachyum, and Knotweed, Japanese (T) - Polygonum cuspidatum (Fallopia japonica)
Tansy ragwort (T) - Senecio jacobaea
Thistle, bull (T) - Cirsium vulgare and Thistle, Milk
Thistle, Canada (T) - Cirsium arvense
Thistle, Italian (T) - Carduus tenuiflorus
Yellow flag iris (T) - Iris psuedacorus
Yellow nutsedge (T) - Cyperus esculentus