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(2) Field Bindweed (10;000 + acres) =This plant has extremely deep roots and usually lies in crop fields. The ability of this plant to compete with crops for nutrients and water is legendary. (3) Locoweed (10,000 + acres) -this natve'rangeland plant is responsible for _. _. _. .. - - -over 70%-over livestock poisoning losses according to studies done by ' Colorado State Uruveisitti:-` :, _ , ` .. , (4) Kochia (20,000 + acres) -this fast-growing weed emerges in unattended - ` fields and Iots. It devalues real estate property more than any urban weed. SECTION VIII..:.: .- ..., _ :.. _ WEEb MANAGEMENT STRATEGIES ,. .. ,::~.. ~; A. OVERVIEW Weeds aze spreading'rapidly-in Colorado and need to be managed to curtail the _ potential economic havoc they cause. , Colorado's weed law, the ,_ _. . ' -Colorado `Weed Mara ement e~cf. g (I~ 90 I175~; became effective on July 1, - -1990 and was. amended by the Colorado State Legtslature by the passage of House Bt11:9b-1008 which became law on May 23, I996; and is known as the = =' - CdI'orado I~fosious Weed .Acr.''The ~ar*i,'found'at'Section 35-5.5-101 et seg•. ' C.ILS. requires 'that integrated weed management systems be used to combat - noxious weeds..: In accordance witfi Section '35-5.5-108 C.RS., designated _. ..- .. , noxious weeds include- those weeds designated by rule of the Commissioner of the State Department of Agriculture and 'those:"designated by local advisory boards for their respective areas. This is provid"ed thatthose designated state and local noxious weeds meet one or more of the following statutory criteria: (1) aggressively invades or. is detrimental to .economic crops or native plant communities, (2) is poisonous to livestock, (3) is a carrier.of detrimental insects, diseases or parasites, or (4) the director indirect effect of the presence of this plant is detrimental to the environmentally sound management of natural or agricultural ecosystems. Weed management is the systematic approach to m;n;m;~e weed impacts and optimize intended land_use. Weed management requires an ongoing effort season after season. Weeds need to be managed during the growing season to reduce or prevent future infestations. Weed control invoked during a growing season should not be evaluated for success of financial .return only, for that season. management must be applied and evaluated over an ,extended time to be successful. A comprehensive weed management plan should be incorporated into a long-term land management program to realize intended land use. There aze three basic weed management strategies: prevention, I3