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Weed Management Plan <br />Table 1. Prioritized List of Weed Species <br />Updated: 23 June 2008 <br />--Priorit /Rank-- <br />Rank: <br />1 = Highest priority <br />2 = medium priority <br />3 = lowest priority <br /> <br /> <br />Common Name <br /> <br />Scientific Name Current <br /> <br />Extent* Potential <br />negative <br />im act* Difficulty of <br /> <br />control* Value of <br /> <br />habitat* Overall <br /> <br />Priority <br />Salt Cedar Tamarix ramosissima 1 1 1 Wetland-2 1 <br />Canada thistle Cirsium arvense 1 1 2 Wetland-1 <br />Russian kna weed Centaurea repens 1 1 1 Ran eland-1 1 <br />Field bindweed Convolvulus arvensis 1 1 2 Ran eland-2 1 <br />Kochia Kochia sco aria 1 2 2 Rangeland-2 2 <br />Lea sure Eu horbia esula 3 1 1 Wetland-1 2 <br />.Hoary cress Cardaria draba 3 1 2 Wetland-1 2 <br />Spotted kna weed Centaurea maculosa 3 2 1 Rangeland-1 2 <br />Diffuse knapweed Centaurea diffusa 3 2 1 Rangeland-1 2 <br />Scotch thistle Ono ordum acanthium 3 2 2 Rangeland-2 3 <br />* See Weed Management Plan for further description of criteria and priority <br />setting.