Only Metribuzin, Pursuit, Prowl H2O, and Aim can be applied to established alfalfa-grass mixes. Carfentrazone (Aim) has promise as a ‘set back’ herbicide for alfalfa seed production. Spraying beyond this stage may cause stand and/or yield reductions. It can be applied at rates from 0.5 to 2.0 oz/ac. AIM can be used in-between cuttings up to 3” of growth, with a pre-harvest interval of 21 days. Perennial Weed Control-Quackgrass, Field Bindweed, Canada Thistle, Johnsongrass, etc. asulam (Asulox) in forage and seed production trials in 2007 and 2008. Keep in mind all of these herbicides are labeled for use in pure-stand alfalfa. (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 Winter is when alfalfa plants go nearly dormant in most of the country, growing extremely slow unable to provide enough competition for weeds. Many newer products on the market contain older active ingredients that work fine in low desert alfalfa … Acuron ® 18 Agent ® 1.88 18 Aim ® EC 12 Alluvex™ 18 Anthem™ ATZ 18 Atrazine 2 cropping seasons Authority ® Brands 12-18. Keep in mind all of these herbicides are labeled for use in pure-stand alfalfa. Herbicides in alfalfa. Winter is the worst time for weeds in alfalfa and understandably so. It is best used at rates from 0.5 to 1.0 oz/ac with 2,4-D. Herbicide registrations increased through the 1980s. INTRODUCTION Weed control is important in alfalfa seed production in order to produce high quality seed and maximize yields. However, only metribuzin, Pursuit, Prowl H2O, and Aim can be applied to established alfalfa-grass mixes. In most cases, 2-inches of alfalfa regrowth is the maximum height listed. Summary: 2007 Herbicide Trial in Alfalfa Seed • Asulox – good alfalfa tolerance with 3 or 6 pt/A, ~80% control of mayweed. In established alfalfa stands AIM and Chateau Herbicide SW are other options that could be used for post-emergent control only in established stands. In most cases, 2 inches of alfalfa regrowth is the maximum height listed. Shark/Aim (carfentrazone, Group 14) – This post-emergence herbicide can be applied when alfalfa is dormant or between cuttings. 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. Seed yield unaffected. Keep in mind all of these herbicides are labeled for use in pure-stand alfalfa. Preharvest Weed Control in Declining Alfalfa Stands Quackgrass, Volunteer Cereals, and Annual Grasses in New or Established Stands According to Earl Creech an Extension agronomist at Utah State University there’s three new herbicides to consider using this winter. In most cases, 2 inches of alfalfa regrowth is the maximum height listed. Autumn™ Super 51 18 Axiom ® 12 Basis ® Blend 10-18. Aim will cause leaf spotting on emerged leaves, but plants quickly outgrow the injury. Herbicide Restrictions for Planting 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. Pesticide Alfalfa Rotation Interval (Months) AAtrex ® 4L or Nine-O 2 cropping seasons Accent ® Q 10-12. Herbicide registration for weeds in alfalfa began following World War II with the first registered selective herbicide 2,4-DB. The material and content contained in the Greenbook label database is for general use information only. Aim herbicide may be applied to wheat from prior to planting up to leaf stem elongation (jointing). 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