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Dowe Flats Quarry Noxious Weed Management Plan <br />TnhlP 7• Fff—f;G fnr 1iZPIPP*P(1 O%npriPC <br />Habitat Management, Inc. 9 September 2015 <br />Project <br />Chemical & Mechanical Controls Palatability <br />may June July August September October Goats Cattle <br />Species <br />Duration <br />Occurrence <br />B -List Species <br />Musk thistle (Carduus nutans) <br />Biennial <br />Known <br />Spot treat fall rosettes with <br />appropriate herbicides, or dig to <br />below ground surface. <br />High <br />High (rosette) <br />Scotch thistle (Onopordum acanthium) <br />Biennial <br />Likely <br />Medium <br />Medium (rosette) <br />Spot treat with appropriate herbicides from <br />rosette to early bloom stage or dig to below <br />ground surface. <br />Hoary cress (Cardaria draba) <br />Perennial <br />Likely <br />High <br />Low <br />Bull thistle (Cirsium vulgare) <br />Biennial <br />Likely <br />Inspect site and treat late emerging <br />plants, or remove flowering plants to <br />prevent seed production. <br />P P <br />Spot treat fall rosettes with <br />appropriate herbicides. <br />High <br />Medium (rosette) <br />Houndstongue (Cvnoglossum officinale) <br />Biennial <br />Likely <br />High <br />Toxic <br />Diffuse knapweed (Centaurea diffusa) <br />Biennial <br />Known <br />Spot treat with appropriate herbicides from <br />rosette to bolting stage. <br />High <br />High (rosette) <br />Spotted knapweed (Centaurea maculosa) <br />Biennial <br />Likely <br />Medium <br />Medium rosette <br />(rosette) <br />Common teasel (Dipsacus fidlonzan) <br />Biennial <br />Known <br />High <br />Medium (rosette) <br />Canada thistle (Cirsitan arvense) <br />Perennial <br />Known <br />Spot treat with appropriate herbicides from <br />rosette to bud stage. <br />High <br />High (rosette) <br />Russian knapweed (Acroptilon repens) <br />Perennial <br />Likely <br />Treat during root bud <br />development <br />Medium <br />Low rosette <br />(rosette) <br />Dalmatian toadflax (Linaria dalmalica) <br />Perennial <br />Known <br />n/a <br />Spot treat from flowering until first frost <br />High <br />High <br />Yellow toadflax (Linaria vulgaris) <br />Perennial <br />Likely <br />High <br />High <br />Leafy spurge (Euphorbia esula) <br />Perennial <br />Likely <br />n/a <br />Spot treat with appropriate herbicides after true flowers develop. <br />High <br />None <br />C -List Species <br />Feb/Nlarch: <br />Cheatgrass (Bromus tectorum) <br />Annual <br />Known <br />Treat with post -emergent herbicides prior to <br />seed production. Very small infestations may be <br />Treat with pre -emergent herbicides prior to emergence. or <br />Treat with pre- <br />& post- <br />Med <br />High, but not <br />hand pulled. <br />post- emergent herbicides after fall emergence. <br />emergent <br />effective control <br />herbicides. <br />Common mullein (1 erbascum thapsus) <br />Biennial <br />Known <br />Spot treat seedlings, rosettes, or early bolting <br />plants with appropriate herbicides, or cut plant <br />Inspect site and treat or remove late emerging plants, remove seed heads to <br />High <br />Low <br />at root crown below lowest leaf. <br />prevent seed dispersal. <br />Common bindweed (Convolvidus arvensis) <br />Perennial <br />Known <br />Spot treat plants with appropriate herbicides in <br />late spring or just after full bloom. <br />Avoid treating drought -stressed plants. <br />Spot treat plants with appropriate <br />herbicides in early fall. <br />High <br />High <br />Habitat Management, Inc. 9 September 2015 <br />