Laserfiche WebLink
Recommended management methods: t <br /> Cultural - Establishment of selected, aggressive grasses can be an effective <br /> cultural control of Canada thistle. Contact your local CSU Extension office or <br /> Natural Resources Conservation Service office for seed mix recommendations. ' <br /> Good grazing management will stimulate grass growth and keep pastures <br /> healthy. Healthy pastures may be more resistant to Canada thistle invasion. Bare <br /> spots caused by overgrazing are prime habitat for weed infestations. ' <br /> Mechanical- Due to the extensive root system,hand-pulling this plant is not a <br /> viable option. Mowing can be effective if repeated at about one-month intervals <br /> throughout the growing season. Combining mowing with herbicides will further ' <br /> enhance control of this weed. Apply herbicides in spring and/or fall, and then <br /> mow during the summer months. <br /> Biological- Canada thistle is typically unpalatable to livestock. Although, cattle ' <br /> have been known to eat the plant when it is in the early growth stages. A gall fly, <br /> Urophora cardui, is effective on large infestations and when combined with other ' <br /> control methods. Insects can be obtained at no charge from the Colorado <br /> Department of Agriculture. Please call 970464-7916 or go to <br /> www.palisadeinsectray.com for more information. ' <br /> Herbicides - The following are recommendations for herbicides that can be <br /> applied to range and pasturelands. Always read, understand, and follow label <br /> directions. The herbicide label is the LAW! , <br /> Herbicide Rate Application Timing/Comments <br /> Milestone 5-7 oz./acre Spring-up to early bud stage and fall rosette stage. Safe near a <br /> or number of trees.Check label for more information. ' <br /> 2.5 ml/gal water Add non-ionic surfactant @ 0.32 oz/gal water or <br /> 1 t/100 Ral water. <br /> Curtail 2-3gts./acre Spring-at 6-10"growth stage to pre-bud and in fall rosette <br /> or stage. <br /> 2.0-2.5 oz/gal water Add non-ionic surfactant @ 0.32 oz/gal water or <br /> 1 t/100 gal water. <br /> Telar XP 2 oz/acre Apply from rosette to flower stage when all plants have ' <br /> emerged. <br /> Add non-ionic surfactant @ 0.32oz/gal water <br /> or 1 t/100 gal water. <br /> Clarity+2,4-D 1 qt./acre for each product Spring-early bud stage and fall rosette stage.DO NOT apply ' <br /> Amine or when outside temperatures will exceed 85 degrees. <br /> 1 oz/gal water for each Add non-ionic surfactant @ 0.32 oz/gal water or <br /> product 1 t/100 gal water. <br /> t <br /> .F, <br />