Shark/Aim (carfentrazone, Group 14) – This post-emergence herbicide can be applied when alfalfa is dormant or between cuttings. In most cases, 2-inches of alfalfa regrowth is the maximum height listed. Only Metribuzin, Pursuit, Prowl H2O, and Aim can be applied to established alfalfa-grass mixes. Winter is when alfalfa plants go nearly dormant in most of the country, growing extremely slow unable to provide enough competition for weeds. Herbicides in alfalfa. Acuron ® 18 Agent ® 1.88 18 Aim ® EC 12 Alluvex™ 18 Anthem™ ATZ 18 Atrazine 2 cropping seasons Authority ® Brands 12-18. asulam (Asulox) in forage and seed production trials in 2007 and 2008. Herbicide registration for weeds in alfalfa began following World War II with the first registered selective herbicide 2,4-DB. Spraying beyond this stage may cause stand and/or yield reductions. Aim herbicide may be applied to wheat from prior to planting up to leaf stem elongation (jointing). Spraying beyond this stage may cause stand and/or yield reductions. Seed yield unaffected. It can be applied at rates from 0.5 to 2.0 oz/ac. Alfalfa (Medicago sativa L.) is popularly known as the Queen of Forages because of its high forage nutritive value characteristics.Alfalfa is a high-yielding, perennial legume that is well-suited for hay, silage, baleage, and grazing management systems. INTRODUCTION Weed control is important in alfalfa seed production in order to produce high quality seed and maximize yields. Keep in mind all of these herbicides are labeled for use in pure-stand alfalfa. In established alfalfa stands AIM and Chateau Herbicide SW are other options that could be used for post-emergent control only in established stands. It is best used at rates from 0.5 to 1.0 oz/ac with 2,4-D. Keep in mind all of these herbicides are labeled for use in pure-stand alfalfa. Summary: 2007 Herbicide Trial in Alfalfa Seed • Asulox – good alfalfa tolerance with 3 or 6 pt/A, ~80% control of mayweed. Carfentrazone (Aim) has promise as a ‘set back’ herbicide for alfalfa seed production. Herbicide registrations increased through the 1980s. However, only metribuzin, Pursuit, Prowl H2O, and Aim can be applied to established alfalfa-grass mixes. The material and content contained in the Greenbook label database is for general use information only. Herbicide Restrictions for Planting Alfalfa. Many newer products on the market contain older active ingredients that work fine in low desert alfalfa … Agworld and Greenbook do not provide any guarantee or assurance that the information obtained through this service is accurate, current or correct, and are therefore not liable for any loss resulting, directly or indirectly, from reliance upon this service. Spraying beyond this stage may cause stand and/or yield reductions. Keep in mind all of these herbicides are labeled for use in pure-stand alfalfa. However, only metribuzin, Pursuit, Prowl H2O, and Aim can be applied to established alfalfa-grass mixes. Perennial Weed Control-Quackgrass, Field Bindweed, Canada Thistle, Johnsongrass, etc. In most cases, 2 inches of alfalfa regrowth is the maximum height listed. Pesticide Alfalfa Rotation Interval (Months) AAtrex ® 4L or Nine-O 2 cropping seasons Accent ® Q 10-12. Autumn™ Super 51 18 Axiom ® 12 Basis ® Blend 10-18. According to Earl Creech an Extension agronomist at Utah State University there’s three new herbicides to consider using this winter. (8 pt/a safe on alfalfa in several 2008 trials – marestail, prickly lettuce, blue mustard, wild oat, and downy brome control) • Aim – 1 or 2 oz/A totally desiccated emerged alfalfa, normal Aim will cause leaf spotting on emerged leaves, but plants quickly outgrow the injury. Winter is the worst time for weeds in alfalfa and understandably so. 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