Laserfiche WebLink
infested rangeland in Figure 4.Two Figure 4. Some spotted knapweed management strategies. <br /> levels of infestation are examined <br /> and two successional weed manage- plant community controlled plant community <br /> ment plans are tested for each sit- prior to weed Designed Controlled species after weed <br /> uation.These examples show how management disturbance colonization performance management <br /> integrating various weed manage- Broadleaf,` Biological Biological 70%seed,species <br /> 98%spotted /herbicide control control <br /> ment systems direct successional knapweed, __ - " <br /> , � _ 20%cheatgrass/ <br /> processes,resulting in different suc- 2%cheatgrass/ —— blae s <br /> cessional patterns and usefulness to bluegrass' Cultivation Mowing \ Mowing 10%spotted, <br /> range managers.The plant commu- I. Non-selective Drill seeding \ •'Early spring •• knapweed <br /> nity after implementation depends / herbicide I grazing._R <br /> 5034 spotted \ 95%cheatgrass/ <br /> upon the weed management system P° Flooding and Broadcast <br /> P g Y kna weed. \ bluegrass; <br /> and the plant community prior to P draining seeding Fertilization 5%'s otfed <br /> 11 �'P 30%native; _ P,� '' <br /> weed management.Climatic vari- plantss Fertilization Sheep \ apweed <br /> ation introduces an uncontrolled 20% "ar grazing \ <br /> bluegrass \ 65%native <br /> random element that can influence Grazing Grazing 'R Broadleaf \\ grasses: <br /> the short-term and long-term out- 6 herbicide 30O%lu atgrassl <br /> Blue <br /> come. Weed management actions Irrigation Broadleaf Reduce soil 5T'spo <br /> should be based on your land use • herbicide s fertility ]tnapweed <br /> objectives, desired degree of energy Irrigation �• <br /> Burning'- . g Irrigation R 20%'nuaces <br /> inputs and economics. Preventing ♦ 50% ativ <br /> The successional weed manage- weed ♦♦ .Ply:" <br /> introductions ♦ 20%blue s <br /> ment model presented here allows ♦ t'x�,for integration of currently avail- Burning ♦�,10%'spotted <br /> able tools.With conceptual models knapweed <br /> of this type,there are seldom large This chart lists the various choices that could be made in devising a strategy to <br /> comprehensive research projects manage spotted knapweed infestations.Follow the track from hypothetical situations <br /> that have tested all possible options in the left hand column through treatment options that design disturbance,control <br /> for a particular plant community. colonization and control species performance to find the expected results in the right <br /> Development of successional weed hand column."R"refers to repeated aplications. <br /> management plans will require use <br /> of existing research information, <br /> management experience and mon- <br /> itoring of successes and failures to <br /> adjust future plans. <br /> FREE <br /> http://www.montana.edu/wwwpb/pubs/mt9909.html <br /> For more online MontGuides,visit http://www.montana.edu/publicafons <br /> Copyright®2004 MSU Extension Service <br /> We encourage the use of this document for nonprofit educational purposes.This document maybe reprinted if no endorsement of a commercial product,service or <br /> company is stated or implied,and if appropriate credit is given to the author and the MSU Extension Service.To use these documents in electronic formats,permission <br /> must be sought from the Ag/Extension Communications Coordinator,Communications Services,416 Culbertson Hall,Montana State University-Bozeman,Bozeman <br /> MT 59717;telephone(406)994-2721;E-mail-publications@montana.edu.To order additional publications call your local county or reservation Extension office,or <br /> visit www.montana.edu/publications <br /> AW <br /> %O-W <br /> The U.S.Department of Agriculture(USDA),Montana State University and the Montana File under: Weeds <br /> - State University Extension Service prohibit discrimination in all of their programs and ac- <br /> tivities on the basis of race,color,national origin,gender,religion,age,disability,political <br /> beliefs,sexual orientation,and marital and family status.Issued in furtherance of coopera- A-11 (Range and Pasture) <br /> live extension work in agriculture and home economics,acts of May 8 and June 30,1914, Reprinted March. 2004 <br /> EXTENSION SERVICE in cooperation with the U.S.Department of Agriculture,Douglas L.Steele,Vice Provost 216-2,000-0304-MG <br /> and Director,Extension Service,Montana State University,Bozeman,MT 59717. <br />