However, companion crops can compete with seedling alfalfa. We removed oat seeded with alfalfa with sethoxydim (Poast, others) or clethodim products (Select, others) to mimic direct seeding while minimizing soil loss potential. Can be tank-mixed with bromoxynil, 2,4-DB, sethoxydim or clethodim. Poast Plus 1E (sethoxydim) — Poast Plus controls annual grasses and suppresses perennial grasses in seedling and established alfalfa. Up to 10 percent non-tolerant seed may be present. Apply in two sequential applications for quackgrass control. 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. Some herbicides restrict use by livestock for at least 30 days after spraying. Wild oat, foxtails, barnyardgrass, crabgrass and fall panicum: Use 1 pint of Poast or 24 fluid ounces of Poast Plus per acre. Not all glyphosate formulations are labeled for use on Roundup Ready alfalfa. Use MSO when there’s moisture stress. Similarly, no herbicides are labeled to remove broadleaf weeds in alfalfa that’s seeded with forage grasses. Unacceptable injury may occur to alfalfa in the second trifoliolate stage or smaller, typical with uneven stands or under weather conditions favoring leaf burn. 2020 Butyrac is labaled for established and new seedings and it is about the only herbicide you can use on new seedings alfalfa o/g mix . Differences in government policies and climate make Progressive Dairy – Canada useful to subscribers up north. Interseeded oat or suppression in oat-mulch systems is not mentioned on the Raptor label, but control of volunteer oat up to 3 inches in height or less is labeled. Add AMS at 8.5 to 17 lb/100 gallons of spray solution. Alfalfa seeded with a companion crop is a traditional practice that has served Minnesota producers well. Apply 1.0 pints per acre to first-year alfalfa within five days after cutting, before alfalfa regrowth reaches 2 inches. Some stunting and yellowing to the alfalfa may occur after application. Impregnation on dry fertilizer can improve crop safety and allow for slightly later applications (up to 3 inches spring regrowth). The 3.5 to 4.5 pint rates give fair to good control of pigweed, lambsquarter and velvetleaf. Poast applied postemergence will control annual and suppress perennial grasses in direct-seeded or oat-mulch systems. Does not specify legume height at application. Depending on weed species, UAN or ammonium sulfate may also be needed (see label). All Rights Reserved. For seedling alfalfa (2-trifoliate to six inches tall), apply Prowl H2O at 1.1 to 2.1 pints pt/A prior to weed emergence. Here are a few guidelines about available products: Gramoxone Inteon 2L (paraquat) — May be applied at 2 to 3 pt/A to established “dormant” stands before 2 inches of spring regrowth. Because it’s a contact herbicide, weeds must have adequate remaining foliage to be controlled. I learned that now Pursuit can be used on mixed stands alf/og. Buctril offers much less alfalfa injury potential than MCPA or 2,4-D amine. 12: 25 (graze or harvest) (Chateau) 4 oz : WSSA MODE-OF-ACTION GROUP NUMBER 1: 14 : COMMENTS: Apply to semi-dormant crop. If severe competition occurs, no herbicide can selectively remove the annual grasses and not severely injure, or completely kill the forage grass seedlings. It’s recommended to use 1 to 1.5 bushels per acre of bin-run oat seed to reduce costs. This relatively early application may require a second application to control weeds that may emerge after Roundup application, but before crop canopy closure. Do not add surfactants or crop oil concentrate. Buctril applied postemergence controls most broadleaf weeds in companion-seeded alfalfa. Apply 1 to 1.5 parts of the 2L formulation or 0.5 to 0.75 pints of the 4EC formulation per acre to seedling alfalfa in the fall or spring when the majority of the field has at least four trifoliolate leaves. Gramoxone produced mediocre results in UC trials. Stagnant alfalfa yields – Is sulfur the culprit? However, only metribuzin and Pursuit can be applied to established alfalfa-grass mixes. See label for species-specific use rates. Rate depends on soil type. If the orchardgrass or tall fescue has re-growth, Gramoxone The following article was written by William Curran and Dwight Ligenfelter, Penn State Weed Science. Use the higher rates when annual grass pressure is heavy or at the maximum height, or when perennial grasses are present. Direct seeding can also increase alfalfa vigor and population density during establishment, especially when the alfalfa seedlings are stressed, such as from droughty conditions during establishment. Do not use on mixed stands. The weeds must be actively growing at the time of application. Direct- or oat-mulch-seeding increases the production of alfalfa forage that’s high in quality the establishment year. Velpar 2L (hexazinone) — Apply Velpar to established alfalfa at 2 to 6 pt/A during the dormant period before 2 inches of spring regrowth. Progressive Cattle magazine captures the essence of the cattle producer and ranching experience. May be used on mixed alfalfa-grass stands. Current research indicates that alternate-row seedings of alfalfa with a grass are beneficial during establishment vs. planting a seed mix in the same row. It will desiccate chickweeds, mustards and seedling dandelions. Do not use on mixed stands. Progressive Forage is the Forage Industry Resource for progressive hay, silage and pasture producers. To make a long story short the Alfalfa and Orchard Grass stoped growing and the weeds didnt. This technique also works well on sandy soil to prevent damage from blowing sand, which is common when alfalfa is direct-seeded on these soils. Apply Poast Plus at 1.5 to 2.5 pt/A to actively growing grassy weeds. Preharvest interval (PHI): 21 days. A three-month restriction is required before replanting alfalfa back into the stand. More intense management of alfalfa often uses direct-seeding, sometimes called solo seeding. Use 2 pounds of dry flowable per acre on coarse and medium soils and 2.5 pounds of dry flowable on fine-textured soils. Apply Pursuit at 1.08 to 2.16 oz/A plus adjuvants to actively growing weeds 1 to 3 inches in height. Pursuit herbicide - posted in Weed and Pest Management: Due to a stretch of very cold and very dry weather for this time of year I had some Alfalfa orchardgrass mixes that got terribly weedy . Preharvest interval (PHI): 30-day PHI before graze, feed or harvest forage. Select 2EC (clethodim) — Apply Select at 6 to 8 fl oz to actively growing grasses that are less than 6 inches tall. Do not use on mixed stands. The magazine is published monthly with a sizeable portion of articles unique to Canadians. View the article, as well as additional information, from the March 9 edition of Penn State Field Crop News. Some growers compromise and apply 44 ounces per acre glyphosate at the third to fifth trifoliate stage. Our #3 Hay and Pasture Mix is the top of the line pasture option for producers seeking the highest yield and forage quality from their grass. Refer to Remarks in the POST grass herbicide section under Soybean for methods to avoid antagonism and reduced grass control from broadleaf herbicides. Mixed stands of alfalfa and orchardgrass are typically less susceptible to weed invasion Sinbar is effective on a number of annual broadleaves and some grasses at the higher rates. While winter weed complexes make first harvest pretty ugly, the weeds may be too advanced for cost-effective herbicide control. Other legumes: The maximum application rate is 32 ounces per acre and the minimum grazing or harvest interval is three days (three-day PHI). Preharvest interval (PHI): 30-day PHI before cutting for feed or grazing spring-treated, underseeded alfalfa; 60-day PHI for fall-treated, underseeded alfalfa. Velpar is effective on annual broadleaves and grasses. Oat should be sprayed, targeting oats that are 4 to 6 inches tall, before considerable competition has occurred. Herbicide must be applied before weed germination in spring, or in-season between cuttings, otherwise weeds will not be controlled. Use the high rate to control redroot pigweed, velvetleaf, ragweed, kochia and wild mustard. If spraying during extended cold periods, expect weeds to respond slower or the herbicide can have reduced activity. per season. Using oat mulch systems make it possible to establish alfalfa with an oat companion crop in areas where erosion potential is a concern, while removing oat competition before long-term stand or vigor damage to alfalfa occurs. © Copyright 2020 Progressive Forage. University of Minnesota Extension discovers science-based solutions, delivers practical education, and engages Minnesotans to build a better future. All rights reserved. Extension is expanding its online education and resources to adapt to COVID-19 restrictions. Do not use on mixed stands.Sinbar 80W (terbacil) — May be applied to established alfalfa at up to 1.5 lb/A or to a new fall seeding at 0.33 to 0.5 lb/A. Timing Herbicide Grass Control Broadleaf Control Crop Safety Preplant Post to weed Roundup Paraquat Y Y Y Y E E ... • Tank-mix the low rate of Pursuit with the low rate of Raptor ... •Labeled for alfalfa-grass mixtures . 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