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i 1 Recommended management methods: Cultural - Establishment of selected, aggressive grasses can be an effective cultural control of field bindweed. Contact your local CSU Extension office or Natural Resources Conservation Service office for seed mix recommendations. Good grazing management will stimulate grass growth and keep pastures healthy. Healthy pastures may be more resistant to field bindweed invasion. Bare spots caused by overgrazing are prime habitat for weed infestations. Mechanical-Cutting, mowing, or pulling has a negligible effect unless the plants are cut below the surface in the early seedling stage. Well-established populations have a large seed bank in the soil that can remain viable for over 40 years. ' Biological- The bindweed gall mite,Aceria mahlerbae, has proven to be effective in reducing field bindweed infestations. Biocontrol agents can be obtained at no charge from the Colorado Department of Agriculture's Insectary. Please call 970- 464-7916 or go to www.palisadeinsectaly.com for more information. Herbicides-The following are recommendations for herbicides that can be applied to range and pasturelands. Optimum results occur when the plants have recently received moisture and are actively growing. Always read,understand, and follow label directions. The herbicide label is the LAW! Clarity+2,4-D 1 qt./acre for each product Spring-at or just after full-bloom and/or fall. Amine or DO NOT apply when outside temperatures will exceed 85 1 oz/gal water for each degrees. ' product DO NOT apply near or under trees or where soils have rapid permeability or where water level is high. Add non-ionic surfactant @ 0.32 oz/gal water or 1 t/100 gal water. *Tordon 22K+ 1 qt./acre for each product Spring-at or just after full-bloom and/or fall. 2,4-D Amine or DO NOT apply when outside temperatures will exceed 85 *this is a Ioz/gal water for each product degrees. Restricted Use DO NOT apply near or under trees or where soils have rapid ' Pesticide* permeability or where water level is high. Add non-ionic surfactant @ 0.32 oz/gal water or 1 t/100 gal water. *Roundup Ultra 4—5 qts./acre Apply at full-bloom and/or fall. *Non-selective or Add a non-ionic surfactant @ 0.32oz/gal water or 1 gt/100 gal herbicide. 4—5 oz/gal water water. Will kill all Use caution when applying near grasses or other desirable vegetation.* vegetation.Roundup will possibly kill surrounding vegetation. i roc OP Field bindweed in es int!a b. e