2016-07-21_REVISION - M1980002 (2)

Home Browse Search

Recommended management methods: Cultural - Seeding and maintaining aggressive grasses will help in competing with leafy spurge and slow its spread. Contact your local CSU Extension office or Natural Resources Conservation Service office for seed mix recommendations. Proper grazing management will stimulate grass growth and keep pastures healthy. Healthy pastures may be more resistant to leafy spurge invasion. Bare spots caused by overgrazing are prime habitat for weed infestations. Mechanical - Due to the extensive root system, hand -pulling this plant is not a viable option. Mowing will reduce seed production if repeated every 2 to 4 weeks during the growing season, but will provide little long-term control. Biological - Both sheep and goats have been found to be effective grazers of leafy spurge. Grazing sheep can commence after spring regrowth reaches 2 to 6 inches tall, but before the flowering bract stage. Goats can graze spurge at any time. Do not overgraze. If leafy spurge has set seed, quarantine animals in a corral for 7 days before releasing them into a non -infested pasture. There are a variety of insects available for release on leafy spurge infestations. The flea beetles, Apthma 1Ugrisctrtls, A. lacertosa, and A. cypaHssiae, have been found to be effective on large infestations and when used in combination with grazing and/or herbicides. Herbicides - The following are recommendations for herbicides that can be applied to range and pasturelands. Always read, understand, and follow herbicide label directions. The herbicide label is the LAW! Herb'idde,x. ' Rate 1 qt./acre for each product A ficationlimin Fo agents Clarity + 2,4-D _ Spring- following appearance of true flowers and/or fall Amine or regrowth. Must treat 2x/year for 14 years. DO NOT apply 1 oz/gal water for each when outside temperatures will exceed 85 degrees. product Add non-ionic surfactant @ 0.32 oz/gaI water or 1 t/ 100 gal water. Plateau 12 oz./acre Fall only treatment prior to hard freeze. or Add a methylated seed oil surfactant (MSO) @ 0.32 oz/gal 0.4 oz/gal water water or I t/100 gal water. 2,4-D Amine 2-3 qts/acre Early spring and fall. Prevents seed formation only. Retreatment or will be necessary. DO NOT apply when outside temperatures 2-3 oz/gal water will exceed 85 degrees. Add non-ionic surfactant @ 0.32oz/gal water or 1 t/10D gal water. Tordon 22K 1 qt./acre Spring- following appearance of true flowers and/or fall *this is a or regrowth. Must repeat annually for 34 years. Restricted Use 1.0 oz/gaI water DO NOT apply near or under trees or where soils have rapid Pesticide* permeability or where water level is high. Add a non-ionic surfactant 4 0.32oz/ al water or 1 qtl100 gal water.