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leaving the weed unchecked, would result in more damage than <br /> controlling it with best available methods . <br /> The plan follows the adaptive management approach: <br /> • First, weed species are identified through inventory of the <br /> property and by gathering information from other sources. <br /> • Second, land management goals and weed management objectives are <br /> established for the property. <br /> • Third, priorities are assigned to the weed species and weed patches <br /> based on the severity of their impacts, while considering the ability <br /> to control them. <br /> • Fourth, methods are considered for controlling them or otherwise <br /> diminishing their impacts and, if necessary, re-order priorities <br /> based on likely impacts on target and non-target species. <br /> • Fifth, An Integrated Weed Management (IWM) plan is developed based on <br /> this information. <br /> • Sixth, the IWM plan is implemented in the spring or fall as <br /> recommended by the CSU Cooperative Extension local office. <br /> • Seventh, the results of management actions are monitored and <br /> evaluated in light of weed management objectives for the management <br /> area. <br /> • Finally, this information is used to modify and improve weed <br /> management objectives, control priorities, and IWM plans, thereby <br /> starting the cycle again. <br /> The premise behind a weed management plan is that a structured, <br /> logical approach to weed management, based on the best available <br /> information, is cheaper and more effective than an ad-hoc <br /> approach where one deals with weed problems as they arise . <br /> 3 . NOXIOUS WEEDS TO BE WATCHED FOR AT THE Perrino PIT. <br /> 1. Leafy spurge (Euphorbia eslua) a. Spotted knapweed (Acroptilon repens) <br /> 2. Canada thistle (Cirsium arvense) b. Musk thistle (Carduus nutans) <br /> 3. Russian knapweed (Acroptilon repens) c. Purple loosestrife (Lythrum salicaria) <br /> 4. Yellow toadflas (Linaria vulgaris) d. Showy milkweed (Aisclepias speciosa) <br /> 5. Saltcedar(Tamarix sp.) e. Russian Olive (Elaeagunus angustifolia) <br /> 6. Hoary cress (Cardaria draba) f. Bursage, skeltonleaf(Ambrosia tomentosa) <br /> 7. Perennial pepperweed (Lepedium tatifolium) g. Bursage, wollyleaf(Ambrosia greyi) <br /> h. Field bindweed (Convolvulus arvensis) <br /> i. Jointed goatgrass (Aegilopa cylindrica) <br /> j. Diffuse knapweed (Centaurea diffusa) <br /> The first 7 species are listed as Priority 1 or 2 for control in <br /> Huerfano County and the remaining 10 are on the State noxious <br /> weed list and should be looked for on the mine and controlled if <br /> needed. <br /> 4 . NUISANCE WEEDS THAT SHOULD BE ADDRESSED <br /> a. Russian thistle, common name tumbleweed <br /> b. Kosha <br /> 66 <br />