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Sand Arroyo Pit- M-1978-283 <br /> Weed Control Plan (cont) <br /> reduce or eradicate weeds that have already established on the <br /> property, according to their actual and potential impacts on the <br /> land management goals for the property, and according to the <br /> ability to control them now versus later. Actions will be taken <br /> only when careful consideration indicates leaving the weed <br /> unchecked, would result in more damage than controlling it with <br /> 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 recom- <br /> mended by the CSU Cooperative Extension local office. <br /> • Seventh, the results of management actions are monitored and evalu- <br /> ated in light of weed management objectives for the management area. <br /> • Finally, this information is used to modify and improve weed manage- <br /> ment objectives, control priorities, and IWM plans, thereby starting <br /> 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 ap- <br /> proach where one deals with weed problems as they arise . <br /> 3 . NOXIOUS WEEDS TO BE WATCHED FOR AT THE SAND ARROYO 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 toadflax (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 /> 45 (REVISED 316/2020) <br />