In most cases, 2-inches of alfalfa regrowth is the maximum height listed. Carfentrazone (Aim) has promise as a âset backâ herbicide for alfalfa seed production. Herbicide Restrictions for Planting Alfalfa. In most cases, 2 inches of alfalfa regrowth is the maximum height listed. However, only metribuzin, Pursuit, Prowl H2O, and Aim can be applied to established alfalfa-grass mixes. 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. Spraying beyond this stage may cause stand and/or yield reductions. Autumnâ¢ Super 51 18 Axiom ® 12 Basis ® Blend 10-18. In most cases, 2 inches of alfalfa regrowth is the maximum height listed. Seed yield unaffected. According to Earl Creech an Extension agronomist at Utah State University thereâs three new herbicides to consider using this winter. Winter is when alfalfa plants go nearly dormant in most of the country, growing extremely slow unable to provide enough competition for weeds. However, only metribuzin, Pursuit, Prowl H2O, and Aim can be applied to established alfalfa-grass mixes. Aim will cause leaf spotting on emerged leaves, but plants quickly outgrow the injury. Shark/Aim (carfentrazone, Group 14) â This post-emergence herbicide can be applied when alfalfa is dormant or between cuttings. Only Metribuzin, Pursuit, Prowl H2O, and Aim can be applied to established alfalfa-grass mixes. It can be applied at rates from 0.5 to 2.0 oz/ac. AIM can be used in-between cuttings up to 3â of growth, with a pre-harvest interval of 21 days. Keep in mind all of these herbicides are labeled for use in pure-stand alfalfa. Summary: 2007 Herbicide Trial in Alfalfa Seed â¢ Asulox â good alfalfa tolerance with 3 or 6 pt/A, ~80% control of mayweed. Spraying beyond this stage may cause stand and/or yield reductions. (8 pt/a safe on alfalfa in several 2008 trials â marestail, prickly lettuce, blue mustard, wild oat, and downy brome control) â¢ Aim â 1 or 2 oz/A totally desiccated emerged alfalfa, normal asulam (Asulox) in forage and seed production trials in 2007 and 2008. Herbicides in 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. 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. Many newer products on the market contain older active ingredients that work fine in low desert alfalfa â¦ INTRODUCTION Weed control is important in alfalfa seed production in order to produce high quality seed and maximize yields. Winter is the worst time for weeds in alfalfa and understandably so. Preharvest Weed Control in Declining Alfalfa Stands Quackgrass, Volunteer Cereals, and Annual Grasses in New or Established Stands 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. Herbicide registration for weeds in alfalfa began following World War II with the first registered selective herbicide 2,4-DB. Keep in mind all of these herbicides are labeled for use in pure-stand alfalfa. Acuron ® 18 Agent ® 1.88 18 Aim ® EC 12 Alluvexâ¢ 18 Anthemâ¢ ATZ 18 Atrazine 2 cropping seasons Authority ® Brands 12-18. Herbicide registrations increased through the 1980s. Spraying beyond this stage may cause stand and/or yield reductions. Pesticide Alfalfa Rotation Interval (Months) AAtrex ® 4L or Nine-O 2 cropping seasons Accent ® Q 10-12. The material and content contained in the Greenbook label database is for general use information only. Perennial Weed Control-Quackgrass, Field Bindweed, Canada Thistle, Johnsongrass, etc. Aim herbicide may be applied to wheat from prior to planting up to leaf stem elongation (jointing).
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