Chemical Weed Control in Alfalfa –2019 Bill McCloskey Extension Weed Science. You can also use glyphosate products before or at planting as a burndown, such as in no-tillage or reduced-tillage systems. Alfalfa Herbicide Timeline Pre 1970 1977-78 1980-84 1992-96 2000-04 Eptam Balan (’77) Velpar (’82) Prowl (’92) Sandea (’02) Butyrac Buctril (’78) Poast (’83) Pursuit (’93) Raptor (’02) Gramoxone Treflan TR-10 (’84) Select (’94) Chateau (’03) Metribuzin Solicam (’96) Prowl H 2 O (’04) Diuron Kerb Roundup Treflan Adapted from … (field bean, kidney, lima, navy, and pinto) Pea (Dry) Lentil; Garbanzo Bean (Chickpea), Cicer arietinum; Oils and Fiber . Aim will cause leaf spotting on emerged leaves, but plants quickly outgrow the injury. Organo-silicon surfactants can be used instead of nonionic surfactants. We conducted extensive research to explore using grass-active herbicides to remove oat companion crops in the 1990s in Minnesota. Irrigation or rainfall is necessary to move the herbicide into the soil. See active ingredients, product application, restrictions, and more. Do not use on alfalfa if any atrazine has been applied the previous 12 months or serious injury may result. The typical use rate is 1 -2 fl oz/A plus necessary adjuvants. Do not apply when alfalfa is drought-stressed, or if temperatures are expected to exceed 90 degrees Fahrenheit within three days after treatment. Time Apply during planting or up to 24 hours after potatoes have been planted. The typical use rate is 1 -2 fl oz/A plus necessary adjuvants. This week I was asked about applying fungicides to alfalfa because of the wet weather pattern we are experiencing. Similarly, no herbicides are labeled to remove broadleaf weeds in alfalfa that’s seeded with forage grasses. Preharvest interval (PHI): Label states a 15-day PHI before grazing, feeding or harvesting (cutting) for forage or hay. You can use the 2.25 pint rate on alfalfa for annual grass control. Do not use on disease stressed alfalfa. 32 oz/acre AIM or RECLAIM with herbicide. There’s an estimated technology fee of approximately $30 to $40 per acre. Shark EW Herbicide. Preharvest interval (PHI): 21 days. Oat should be sprayed, targeting oats that are 4 to 6 inches tall, before considerable competition has occurred. Aim herbicide may be applied to wheat from prior to planting up to leaf stem elongation (jointing). For the control of downy bromegrass and annual bluegrass, Arrow® or Select Max® can be used as a post-emergent application in seedling and established alfalfa. Do not apply to forage grass/legume mixtures, except on Conservation Reserve Program government acres -- in this case, treated forage cannot be grazed or harvested if released. This product is not … This reduces the chance that a second application will be needed to control a new flush of weeds, while minimizing the issue created with removing larger, susceptible plants. I also have a lot of bindweed and Chinese lettuce in my first cutting. Pursuit® and Raptor® are two good post-emergent options that tend to cause less alfalfa injury and may be a better options for fields with growing alfalfa plants. This presentation will focus on tolerance of alfalfa to flumioxazin (Chateau) and several other promising herbicides, carfentrazone (Aim) and asulam (Asulox), that may be registered in the near future for … This can slow the growth of broadleaf weeds, while allowing the alfalfa seedlings to re-grow with reduced weed competition. It may be useful where late flushes of annual weeds occur, and for weeds where significant growth is below the cutting height. 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