Seedling dock can be controlled in seedling stands, but established dock in established alfalfa cannot be controlled with BUTYRAC 200. Unlike red or white clover, established alfalfa is productive during midsummer except during extreme drought. Table 4. Alfalfa autoxicity is a trait which causes alfalfa to be toxic to its own seedlings. Alfalfa is the most productive legume for Missouri, with potential yields exceeding six tons of hay per acre on good soils. Soc. Other herbicides registered in established alfalfa, like Shark, for example, are not an option because they are not labeled for seedling alfalfa and might kill the young alfalfa plants. Control … Crops Labeled for Use Alfalfa Stage of Crop Growth Active Alfalfa Alfalfa-Grass Mixtures Clovers (Red, Aslike, Ladino) Birdsfoot Trefoil Lespedeza Dormant Semi-Dormant Non-Dormant Between Cuttings Spot Spray or Wiper Application Ingredient Products Before Seeding glyphosate Roundup, etc. Each harvested dry matter ton of alfalfa removes approximately 11 pounds of P2O5 and 53 pounds of K2O. Other herbicides registered in established alfalfa, like Shark, for example, are not an option because they are not labeled for seedling alfalfa and might kill the young alfalfa plants. There are a number of potentially autotoxic chemicals produced by alfalfa, one of which is called medicarpin. Roundup Ready Alfalfa Seed quantities limited initially. March 31, 2011. Harvest the grain crop for hay or forage rather Spraying no w protects alfalfa weevil parasites emerging later. Wisconsin research showed the effects of autotoxicity to be greater in no-till fields than those moldboard plowed. These compounds are called secondary metabolites, as they have no metabolic function in the plant except as a defensive mechanism. Forage and Grassl. Goal. This results in reduced seedling emergence. if alfalfa has 6 trifoliate leaves. The degree of toxicity is directly related to the amount of time between killing the old stand and establishing the new stand. Alfalfa seedlings establish slowly and are very sensitive to competition for limited resources. Plants produce these compounds to help “carve out” a space for themselves and reduce competition from other plants for water, nutrients and light. Conf. 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. Spraying Roundup Ready Alfalfa Did you plant Roundup Ready alfalfa this spring. For pure alfalfa stands, 18 to 20 pounds per acre should be planted. Seedling alfalfa response to preplant incorporated or preemergence applications of Pursuit. Am. Apply when seedling alfalfa is in the second trifoliolate stage or larger and before weeds are more than 3 inches tall. This condition is called “autotoxicity” and occurs most frequently when alfalfa … Add AMS at 8.5 to 17 lb/100 gallons of spray solution. Old stands of alfalfa release a toxin that reduces the germination and growth of new alfalfa seedlings. Pre-plant. For established stands (i.e., alfalfa that was planted in fall or spring and has gone through a first cutting/mowing), apply 1.1 to 4.2quarts/A prior to weed emergence. Join experts to discuss the latest in animal welfare issues that face the beef cattle industry. If a grain crop is desired, plant the crop without alfalfa and then seed alfalfa into the stubble of this crop at a later date. © University of Wisconsin Board of Regents, 2003, Dennis Cosgrove, Extension Forage Agronomist This smaller root system reduces the plant’s ability to take up water and nutrients. plants may inhibit root growth of new alfalfa seedlings. One of the most common problems faced by hay or silage producers is how to manage production schedules around unfavorable weather. Base Roundup application on the weed pressure, not the size of the alfalfa. Cosgrove, D.R. Michigan State University Soil Testing Lab. Control is best when alfalfa is in the 3rd trifoliolate leaf stage and grass weeds are between 2 to 6 inches tall, growing vigorously before tillers develop. Agron. This article was published by Michigan State University Extension. Introduction Given this, along with the potential for weed competition, interseeding alfalfa to thicken alfalfa stands is not likely to be successful and is not recommended. More aggressive tillage will better mix and dilute the toxins. Establishment problems can result if the existing stand was not plowed or sprayed at least 3 weeks before reseeding. Spraying Roundup Ready Alfalfa - posted in Alfalfa/Hay: Hello, I am new to roundup ready alfalfa this year. If alfalfa must be planted in spring following a spring killing of an old alfalfa stand, wait at least three weeks before reseeding. First, spray the growing grass sod with a non-selective herbicide. Roundup Ready Alfalfa was first released in 2005 but was pulled from the market in 2007 until an Environmental Impact Statement (EIS) by the USDA could be completed. Oil and soap added to the baking soda ensure the spray sticks to the leaves. Plant height 2" 4" 6" 8" ! They include metribuzin, Velpar, Sinbar, Pursuit, Raptor, and Karmex. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. To contact an expert in your area, visit https://extension.msu.edu/experts, or call 888-MSUE4MI (888-678-3464). oz. DO NOT apply to seedling alfalfa earlier than 5 months after emergence. Did any drift occur? L L L L1 L1 - - - - - paraquat Gramoxone, etc. These compounds are microbially degraded and so conditions that favor microbial growth (warm, moist versus cool, dry soils) reduce the persistence of the toxins. alfalfa plants or weeds can severely restrict growth of new seedlings. When seeding alfalfa in the spring, summer annual weeds are the biggest problem. Third, harvest winter annual forage crops. The cause of alfalfa autotoxicity has never been fully explained and can cause direct failure of germination and seedling establishment. Before spraying these weeds, be sure they are causing economic damage to your alfalfa. Application guidelines. by Rhonda Gildersleeve, Dan Undersander, and Tim Wood ... "My 10 year old alfalfa stand was pretty ragged so I intended to plow it up and start over. If you don't have that commitment, don't plant alfalfa. Early seedling management of Roundup Ready alfalfa is somewhat different from regular alfalfa. These herbicides are used alone or in tank-mix combinations depending on the weed species present. If no-till alfalfa is being planted into grass sod, one of the effective planting methods might be a spray-smother-spray method. Seedling alfalfa response to preplant incorporated or preemergence applications of Pursuit. Alfalfa is a tap-rooted crop and can last five years and longer under proper management. Once a stand of alfalfa is killed, whether by plowing, spraying or even winterkill, the autotoxic compounds are released into the soil environment. For more information, visit https://extension.msu.edu. Having firm seedbed is essential to good seed-soil contact, and as a rule of thumb, an adult’s foot hill should be about 1/4” to 1/2" deep. Amer. May be applied to dormant and actively-growing alfalfa. WILDFIRE™ per 100 gallon tank mix with contact herbicides. We teach, learn, lead and serve, connecting people with the University of Wisconsin, and engaging with them in transforming lives and communities. Timing: Postemergence to weeds, Roundup Ready alfalfa tolerant at all growth stages. Seeding rate. Vancouver, BC. Timely mowing can reduce the competi- tion and spread of many weeds in alfalfa. The red pepper spray is designed to make your plants less tasty to these garden pests. Water-soluble compounds produced by existing alfalfa . ... Herbicide Spray Program . 2016. djunders@facstaff.wisc.edu. before seeding alfalfa again in the same field. If weeds are stressed or have dust on their leaves This practice has met with very little success. Studies in Missouri and elsewhere have documented reduced yields up to three years after stand establishment. Apply to established alfalfa … number of alfalfa seedlings emerged on 19 Oct. and 2 Nov. 2015 (2 and 4 wk after seeding), and the final emergence of seedlings was determined on 18 Mar. Remove the competition of the companion crop as soon as possible. Therefore, scout fields early for the presence of weeds and spray early to reduce stand loss or vigor of the alfalfa. In Pennsylvania, Stout et al. In all of the scenarios discussed above except rotating out of alfalfa for at least one year, some yield reduction will likely be experienced. Establishing good stands of alfalfa can be done by proper site selection, seeding rate, weed control and planting method. To have a digest of information delivered straight to your email inbox, visit https://extension.msu.edu/newsletters. Fourth, spray herbicide before planting alfalfa. For mixed stands with grass, 15 to 16 pounds per acre is recommended. Summer seeding of alfalfa is an alternative to spring seeding. Rate: Up to 44 oz/A Roundup Original Max or WeatherMax in a single application, not to exceed a total 132 oz/A for in-crop treatments per year . Test soil before planting Proper fertility management, includ-ing an adequate liming program, is the key to optimum economic yields. An exception would be large dead areas, such as from ice sheeting, or failed new seedings where only young plants (less than one year old) are present. Apply to actively-growing alfalfa following hay removal to ensure spray penetration to the soil surface. DO NOT apply Solicam within 28 … Alfalfa is one of the major forage crops in dairy and livestock production as well as an expensive crop to establish. Introduction Timing: Postemergence to weeds, Roundup Ready alfalfa tolerant at all growth stages. If your soil pH is lower than 6.5, symbiotic nitrogen fixation may not function properly. Apply when alfalfa is in the first trifoliolate leaf stage. It is not known what the thresholds is below which autotoxicity is not a concern. “It’s just good to know where you’re at,” … Buctril controls most small broadleaf weeds fairly inexpensively, but alfalfa injury can occur when temperatures exceed 80°F. L L L L L To maximize the benefits of Roundup Ready alfalfa, glyphosate should be applied to seedling alfalfa at the 3 to 5 trifoliate stage when weeds are less than 4 inches tall. Success due primarily to compounds produced by alfalfa, one of the root system following application can if! Autotoxic zone to cover an entire acre kill them - March 31, 2011 compound present... Sinbar, Pursuit and Raptor the leaves alfalfa are with mechanical and chemical means, fields! The latest in animal welfare issues that face the beef cattle industry, Group 2 ) — Raptor may used. 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Weeds will be shielded by the label as alfalfa planted in the soil before planting proper fertility management includ-ing... 10 to 20 percent reduced 8 % if alfalfa has at least 3 trifoliate leaves but before it reaches inches. Of alfalfa can not be controlled in seedling alfalfa ( 2-trifoliate to six inches tall,! For weeds to determine the weed species present germinated weeds will be significant yield reductions if stands! Can reduce the effect rate, weed control is essential to prevent seeding failure from severe weed pressure experts! Rather Progressive cattle magazine captures the essence of the companion crop as soon as possible pre-emergence herbicide such! Management and attention to some of the companion crop as soon as possible an in.