Measures to reduce the potential of developing glyphosate-resistant weeds can include crop rotation, herbicide rotation, proper herbicide rate, proper herbicide timing, and alternative weed control methods such as tillage and mowing. Follow label guidelines.2 Herbicide should be applied to alfalfa with at least 10 inches of spring growth or after 6 inches of alfalfa regrowth. Yield longevity of an alfalfa stand depends on successful initial establishment of the crop since all subsequent harvests are dependent on initial stand density. LEARN HOW TO STOP THE INVASIVE SPOTTED LANTERNFLY, Coronavirus: Information and resources for the Extension Community, Download PDF Save For Later Print Purchase Print. Repeated applications of any herbicide, including glyphosate, may result in herbicide-resistant weeds. It has also been observed that using Roundup on Roundup Ready Alfalfa gets rid of the weeds/oats, leaving ONLY alfalfa! Alfalfa (Medicago sativa) is an important perennial forage crop used around the world. If your alfalfa is a Roundup Ready variety, you have some flexibility in timing the application of Roundup. 2,4-D and dicamba can be applied in the fall or spring prior to corn but should be applied to alfalfa that is actively growing with at least 10 inches of spring growth or 6 inches of post-harvest regrowth. With the broadest application timing window plus excellent crop safety, Roundup Ready Alfalfa requires minimal waiting — only 5 days before grazing or harvest. Alfalfa is the fourth largest crop, in terms of acreage, grown in the United States behind corn, soybeans, and wheat. Weeds and alfalfa hay quality. A South Dakota alfalfa seed grower who filed suit when Roundup Ready alfalfa was released in 2005 remains in a legal battle against its parent company. If weeds get more than 3 inches tall or alfalfa begins to form a canopy, weed control may not be as effective. If the glyphosate application is made after the 3 to 5 trifoliate stage, some yield loss may occur due to the competitive effects of the weed on the crop; in other words, the damage has already been done. A second reason for glyphosate application at this time is to control the alfalfa "nulls." California is the leading producer of alfalfa hay in the United States, followed by Wisconsin, South Dakota, Minnesota, and Idaho. The label states to apply 22 to 44 ounces per acre when newly seeded alfalfa is at or before the third to fourth trifoliate stage to avoid gaps due to stand loss of susceptible alfalfa once plants are larger. If weed problems persist, an additional application of glyphosate can be made up to 5 days prior to harvest. for Roundup Ready® Alfalfa Seed Production IntRoductIon The genetic supplier members (hereinafter called the “Companies”) of National Alfalfa & Forage Alliance (NAFA) have agreed to jointly adopt, as a minimum, the following Best Management Practices for Roundup Ready Alfalfa (RRA) Seed Production in the United States. For production management, ask for the America’s Alfalfa Roundup Ready® Alfalfa Management Guide booklet. Currently, there are no herbicides labeled for use in new alfalfa-grass seedings, so Roundup Ready alfalfa may be an option. Once herbicide-resistant weeds become established within a field, the herbicide becomes ineffective against those weeds that are resistant. Dicamba may range from zero to 30 days. My food plots are located in Northern Wisconsin. If you wait and alfalfa shoots are green when you spray, your alfalfa growth might be set back a couple weeks. Jeff Jackson, Winfield's Forage and Corn Silage Specialist, shows the difference between a new seeding of RR Alfalfa compared to conventional alfalfa. In fact, over 95% of weed control in a healthy established alfalfa crop can be attributed to the alfalfa's competitive nature. Glyphosate should only be applied when conditions warrant weed control as to reduce the potential development of glyphosate-resistant weeds. Journal of Production Agriculture 12:681-684. Alfalfa (Medicago sativa) is an important perennial forage crop used around the world. Companion crops reduce stand loss due to wind and water erosion and may suppress growth of some weeds. uctril controls most small broadleaf weeds, but alfalfa injury can occur when temperatures exceed 80 degrees. During mild winter weather would be a great time. Up to 10 percent non-tolerant seed may be present. We also saw some benefit in 2011 to using roundup ready varieties when field conditions forced late plantings of the alfalfa. oz 3S formulations, Remove livestock before application and wait a minimum of 5 days after application before grazing, or cutting and feeding forage or hay, After the first cutting, apply up to 5 days prior to harvest. Why do we need this? Once alfalfa is established and is successfully into the forage production period (after the first harvest), well managed alfalfa stands are generally vigorous and aggressive enough to compete well with later emerging weeds. Table compares the relative effectiveness of herbicides for control of Roundup Ready alfalfa. Roundup Ready alfalfa removal prior to crop rotation is similar to conventional alfalfa varieties. Crop protection companies are suggesting how growers of the herbicide-tolerant alfalfa can manage the new crop’s weed control program. into the alfalfa plant. In particular, it is important to spray Roundup Ready alfalfa when it reaches the third or fourth trifoliate leaf stage – whether weeds are a problem or not! Growth regulator herbicides such as 2,4-D and dicamba are the most common herbicides for removing alfalfa prior to crop rotation in no-till conditions. The introduction of Roundup Ready alfalfa provides a new option for weed management in alfalfa. But why spray if weeds are not a problem. Effects of weed and invertebrate control on alfalfa establishment in oat stubble. It’s common to want to take a first cutting before killing an alfalfa stand and planting the field to a different crop. Crop injury rating of 1 or less is rarely significant. And spray Roundup before weeds and alfalfa seedlings get more than about three inches tall. It is done, and Roundup Ready (RR) alfalfa is back as of mid-winter and cleared as safe for planting and harvesting. Always start with a weed-free field. Roundup Ready Alfalfa spraying - posted in Alfalfa/Hay: I have a field of RR alfalfa. Roundup Ready soybeans patent expired in 2014. Additional information on Roundup Ready crops is … Spraying at the 3 to 5 leaf stage insures that all alfalfa seedings have emerged. Second applications. Roundup Ready Alfalfa seed or crops (including hay and hay products) to China. For perennial weed problems, glyphosate should be applied during early fall. Roundup Ready alfalfa can provide high quality, weed-free forage with excellent crop safety and minimal harvest restrictions. Results may differ with variations in alfalfa size, temperature, and rainfall. When considering the value of this technology, the Royalty fee should be amortized over the life of the stand and the value of glyphosate herbicide should be compared to other competitive products. Drop nozzles should be used for optimum spray coverage and weed control when corn is 24 to 30 inches tall. Applying glyphosate prior to the 3 to 5 trifoliate stage may be too early for effective weed control since many of the weeds have not emerged by this time (depending on seeding date). Roundup Ready alfalfa management is identical to conventional alfalfa management in all respects except weed control. Currently, the best herbicides for control of alfalfa include 2,4-D, dicamba (Banvel), and clopyralid (Stinger). ... Making Your Alfalfa Better #791 (Air Date 6/2/13) - Duration: 6:35. Like other Roundup Ready crops, a Technology Use Agreement will be necessary as well as a "Line Item Technology Royalty Fee" in addition to the cost of the seed. 1999. The alfalfa crop will remain in the field for several growing seasons and will be harvested several times each season. 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 . The importance of this herbicide application is two-fold. The same thing occurred in several other fields that spring. Linn, and N.P. It also didn’t exhibit the yellowing and necrosis found in the sprayed area. ALFALFA WITH ROUNDUP READY GENE - ANNUAL WEEDS General Information SEED POTATO PRECAUTION Potatoes grown for seed are very sensitive to glyphosate at extremely low concentrations. Therefore, with alfalfa, management practices will not only affect the first harvest of the crop, but will also affect subsequent harvests within the life of the alfalfa stand. Weed competition during establishment will reduce alfalfa seedling vigor and potentially reduce the alfalfa plant population, which can affect crop yield and quality throughout the life of the stand. If properly planned, Roundup Ready alfalfa is no more difficult to remove than conventional alfalfa varieties. It is generally non-selective and gives broad-spectrum control of many annual and perennial weeds, woody brush, trees and vines. Chuck Noble of Winner, S.D., said that a Washington, DC, district appeals court ruled on June 10, 2013, that, while concerns exist, a lawsuit opposing the use of the Monsanto product isn’t warranted. Greater than 95% control can be achieved with a combination of 2,4-D and dicamba without tillage when used prior to no-till corn. 1 Only 2,4-D may be applied prior to soybean planting. See All Pest, Disease and Weed Identification, See All Beer, Hard Cider, and Distilled Spirits, See All Community Planning and Engagement, 22 to 44 fl. These herbicides tend to cause less injury to your alfalfa. Similar to other Roundup Ready crops on the market today such as corn and soybean, a single bacterial gene that modifies 5-enolpruvylshikimate-3-phosphate (EPSP) synthase has been inserted into the alfalfa plant to allow resistance to glyphosate. In addition, successful weed seed production during alfalfa establishment will potentially increase weed seed reserves in the soil, contributing to future infestations. Progressive Cattle magazine captures the essence of the cattle producer and ranching experience. There is little or no crop injury associated with glyphosate application and Roundup Ready alfalfa. Roundup Ready technology has been successfully incorporated into alfalfa and is scheduled for commercial release in 2005. In a small area that hadn’t been sprayed, alfalfa was 8–12 inches taller than where glyphosate had been applied. In the Northeast, alfalfa is often seeded with a grass in a mixed stand. The sun will help the vinegar dry out and kill them. Jung, J.G. Glyphosate resistance management should always be implemented when using glyphosate-resistant crops, such as Roundup Ready alfalfa. Roundup Ready alfalfa incorporates genetic resistance to the herbicide glyphosate (Roundup, Touchdown, Glyphomax, etc.) Rotation to non-Roundup Ready crops using nonglyphosate herbicides after Roundup Ready crops is also effective in reducing the potential for glyphosate-resistant weeds. Entering your postal code will help us provide news or event updates for your area. In both newly seeded and established stands, to preserve the yield and quality potential of forage and hay, … ROUNDUP READY ALFALFA - ESTABLISHED STANDS (NON-SEEDING YEAR) General Information PRODUCT INFORMATION Product Description: This product is a postemergence, systemic herbicide with no soil residual activity. Timing: Postemergence to weeds, Roundup Ready alfalfa tolerant at all growth stages. Many farmers are talking and asking about it, says an agronomist for Croplan Genetics, which is one of the companies that has RR alfalfa available. Journal of Production Agriculture 5:349-352. But if weeds are present at earlier stages of alfalfa growth Roundup can be sprayed on … Roundup Ready Alfalfa has demonstrated it makes late summer seeding of alfalfa a great option. History. glyphosate application is necessary at the 3 to 5 trifoliate leaf stage to remove the small percentage of glyphosate-susceptible alfalfa plants that can be present in a new seeding (and to kill any weeds present in the stand). By: Keef. Traditionally, oats 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. Alfalfa is the fourth largest crop grown in the United States behind corn, soybeans, and wheat. Vol is correct about weed control in Roundup Ready alfalfa using 22 oz. Roundup Ready alfalfa incorporates genetic resistance to the herbicide glyphosate (Roundup, Touchdown, Glyphomax, etc.) Prepared by Bryan L. Dillehay, Ph.D. candidate, and William S. Curran, professor of weed science. Preliminary research has shown that it is possible to attain good weed control in mixed alfalfa-grass stands using glyphosate and Roundup Ready alfalfa, but strict management guidelines must be followed. First and most importantly, effective weed control should be implemented at this stage so that crop yield losses do not occur from weed competition. The portion that retained good snow cover last winter is now between knee and waist high and just starting to bloom. Alfalfa forage composition as affected by weeds can have significant impacts on protein content and overall feed quality (Cords 1973). Similar to other Roundup Ready crops on the market today such as corn and soybean, a single bacterial gene that modifies 5-enolpruvylshikimate-3-phosphate (EPSP) synthase has been inserted into the alfalfa plant to allow resistance to glyphosate. Evaluating alfalfa stands 30-40 days after planting is an eye opening experience for many. In corn with Roundup Ready® 2 Technology, Roundup® brand glyphosate-only agricultural herbicides can be applied broadcast up to the V8 growth stage or 30-inch tall corn, whichever comes first. You must have JavaScript enabled in your browser to utilize the functionality of this website. Roundup Ready alfalfa is resistant to glyphosate herbicide which can be used to provide weed control. Ratings are based on labeled application rates and alfalfa size or growth stage. If they are at a threshold level, you may want to tank mix an insecticide with the Glyphosate to kill the weevil and have two or … In particular, alfalfa-grass mixtures and alfalfa seeded with companion or nurse crops are generally not suitable. potential in the following years. oz Roundup Weathermax 4.5S or 32 to 64 fl. However, once conventional alfalfa starts growing, you can't control these weeds very well without also hurting your alfalfa. Spray Weeds Early with Roundup Ready Alfalfa By Bruce Anderson Extension Forage Specialist University of Nebraska–Lincoln If you planted Roundup Ready® alfalfa this spring, it may be time for that first herbicide application. Fields with perennial weed problems may also be good candidates. Current Roundup Ready crops include soy, maize (corn), canola, sugar beets, cotton and alfalfa, with wheat still under development. If the alfalfa isn’t a Roundup Ready variety, glyphosate can be applied 36 hours or longer before harvesting. Once conventional alfalfa starts growing, you can't control these weeds very well without hurting your alfalfa. Roundup Ready® (GENRR) alfalfa, which enables growers to apply glyphosate agricultural herbicides up to 5 days before cutting for unsurpassed weed control with excellent crop safety. Cords, H.P. Martin. Unlike annual cropping systems, alfalfa management differs greatly due to its perennial habit of growth. The effectiveness of glyphosate and other herbicides on common alfalfa weeds are described in Table 1. Alfalfa is also used for greenchop and silage in many areas. The 3 to 5 trifoliate stage recommendation applies to both spring and late summer seeded alfalfa crops. 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. Multiple sprouting from eyes, weak … Thus, careful weed management during the establishment period of alfalfa is essential for maximum returns from an alfalfa crop over the life of the stand. Roundup Ready alfalfa may also help in the establishment of no-till alfalfa stands; however, additional research is still needed on effectively using no-till in Roundup Ready alfalfa. On Farm Observations. 1973. When I replanted, I went through most of the entire field. Bahler, and L.D. An initial glyphosate application is necessary at the 3 to 5 trifoliate stage to remove the small percentage of glyphosate-susceptible alfalfa plants that are present in the new seeding. Daughter tuber damage may occur at levels where mother crop symptoms are not visible. Alfalfa was treated with 22 and 44 ounces of Roundup PowerMax per acre, and cold temperatures followed within a few days. … Fortunately, if you treat your alfalfa as soon as possible during upcoming spring-like weather, you can have cleaner, healthier alfalfa at first cutting. It states “the initial. Roundup did and excellent job of controlling the different populations of weeds that occurred with the late plantings. Roundup Ready alfalfa should be seeded at typical rates while the seedbed may be prepared through tillage or if suitable, through no-till. Early seedling management of Roundup Ready alfalfa is somewhat different than with regular alfalfa. Although Roundup Ready alfalfa can be an excellent option for weed control in alfalfa, it may not be appropriate for all situations. During the last month I have had several calls about the proper timing to spray Roundup Ready alfalfa varieties with Roundup. If your alfalfa variety is Roundup Ready, you can spray almost any time without hurting your alfalfa. Of course, it makes sense to spray if you have weeds. If necessary, the spring application should be made when weeds are actively growing but less than 4 inches tall. The perplexing part of the situation was that this was Roundup Ready alfalfa. Roundup Ready alfalfa should also be removed by similar methods. Glyphosate must be applied before any grass emergence and can not be used beyond establishment because of it's effectiveness on grasses. When glyphosate is applied to susceptible plants, glyphosate blocks EPSP synthase preventing the production of essential amino acids and the plant dies. Add AMS at 8.5 to 17 lb/100 gallons of spray solution. This publication reviews Preliminary results indicate that the alfalfa stand is increased, while weed density is reduced in Roundup Ready alfalfa/grass mixtures and that these effects may persist into the life of the stand. Kuehn, C.S., H.G. Read the thread about RR corn. But if weeds are present at earlier stages of alfalfa growth Roundup can be sprayed on Roundup Ready alfalfa from emergence up through any stage of plant growth. Roundup Ready Alfalfa Seed quantities limited initially. The rest is about 6 inches tall. Get notified when we have news, courses, or events of interest to you. 1999). Strategies for Weed Management in Roundup Ready Alfalfa AFGC ORG. The Roundup Ready trait in alfalfa … In addition, due to the unique cropping practices do not plant Genuity Roundup Ready Alfalfa in Imperial County, California, pending import approval in China and until Monsanto grants expressed permission for such planting. The most critical time for weed management in alfalfa is during establishment. However, recent research and field observations have documented that injury is possible under certain conditions. Up to 10 percent of the Roundup Ready alfalfa seedlings may not be resistant to glyphosate due to the genetic diversity of alfalfa; these susceptible plants are referred to as "nulls." In addition, fields that tend to have low weed populations may not need the weed control that glyphosate can provide. The first fields of Roundup Ready alfalfa are being planted and managed this year since USDA deregulated the crop. Renz outlines several options for this scenario. glyphosate application is necessary at the 3 to 5 trifoliate leaf stage to remove the small percentage of glyphosate-susceptible alfalfa plants that can be present in a new seeding (and to kill any weeds present in the stand). Planted the first time in Aug of 13 and the second time about May 5th. Weed management in alfalfa is critical during stand establishment to ensure successful plant population. Leaf number and leaf content in alfalfa hay are direct indicators for digestibility, crude protein, and relative feed value (Kuehn et al. This year I was thinking of planting them in roundup ready alfalfa figuring I could atleast spray roundup over the summer to keep the broad leaf weeds and grass down, and then maybe go back to clover in a year or two. If weed problems persist after the initial application, a second application of glyphosate may be applied up to 5 days prior to first harvest. EPSP synthase is present in most plants and is an enzyme essential for protein synthesis and normal plant growth. However, in plants that are Roundup Ready, a modified EPSP synthase is unaffected by glyphosate and allows the plant to continue growing. That's all there is to it. When rotating into other crops, some additional consideration should be made for removal of Roundup Ready alfalfa. It is formulated as a water-soluble liquid … (1992) demonstrated that controlling weeds during the establishment year reduced stress on alfalfa, increased seedling weight and leaf numbers, and ultimately increased yields the following year. Once the alfalfa reaches the 3 to 5 trifoliate stage (typically about 4 to 6 weeks after planting) a glyphosate application should be made (Table 2). If weed problems persist, an additional application of glyphosate can be made up to 5 days prior to harvest. into the alfalfa plant. Ratings were collected from trials conducted in Pennsylvania or neighboring states. Some late summer seedings may require an additional herbicide application in the spring if weeds are present. After the first harvest, and in subsequent years, glyphosate may be applied up to 5 days prior to harvest and when annual weeds are less than 4 inches tall. Increased, High-Quality Yield Opportunity Roundup Ready Alfalfa can deliver a higher percentage of pure alfalfa in hay and haylage than competitors, along with improved quality. Deep tillage is also effective for removing established alfalfa stands. Compared to Scott Valley, alfalfa growth in Tulelake is delayed in the spring, and very late-spring frosts are more commonplace. In 1996, genetically modified Roundup Ready soybeans resistant to Roundup became commercially available, followed by Roundup Ready corn in 1998. If it does get late and alfalfa turns green before you can spray, switch your herbicide choice to either Pursuit or Raptor. Late summer seedings may have glyphosate applied in the fall or spring to control weeds. Exposure of the seed potato crop can cause germination failure or deformities. View our privacy policy. Results may differ with variation in weed size, temperature, rainfall, soil moisture, soil type, and soil pH. Leath, C.C. To maximize alfalfa production for yield and quality, weed management should be addressed. In Pennsylvania, Stout et al. Roundup Ready alfalfa can be planted in the spring or late summer using standard alfalfa establishment practices. Characteristics of alfalfa hay quality grades based on the relative feed value index. At Penn State, glyphosate was used for weed control during early establishment of Roundup Ready alfalfa, while the grass was seeded after herbicide application (4 to 5 weeks after seeding alfalfa). of Glyphosate/acre. Don’t wait too long, though. Glyphosate, of course, is not effective in the control of Roundup Ready alfalfa; however, glyphosate alone is also not an effective means for control of conventional alfalfa. In no-till and reduced-till systems, apply a herbicide burndown application to control existing weeds at least 1 to 2 weeks before planting. JavaScript seems to be disabled in your browser. Spraying at the 3 to 5 leaf stage insures that all alfalfa seedings have emerged. This is reported in the new “Weed Control in Alfalfa” publication highlighted in last months issue. Eliminating competition will help establish thicker, more productive stands more rapidly. For spring seedings in the Midwest, companion crops also … Loading... Unsubscribe from AFGC ORG? Did any drift occur? By entering your email, you consent to receive communications from Penn State Extension. There tends to be a large amount of weed pressure in spring planted alfalfa, and Roundup is one of the best options for controlling them. 1992. No other pre-emergent herbicides can be used on spring planted alfalfa, which is why it is important to utilize this Roundup Ready trait during spring planting. Table compares the relative effectiveness of herbicides on individual weeds. Specifically, a combination of 1 pt/acre of 2,4-D plus 1 pt/acre of dicamba (0.5 lb ae/acre of each) is the most effective control for Roundup Ready alfalfa; the combination of 2,4-D and dicamba is more reliable and effective than either herbicide alone (Table 3). Roundup Ready alfalfa is a potential solution for historically weedy fields that are to be planted to alfalfa. 10 = 95-100%9 = 85-95%8 = 75-85%7 = 75-65%6 = 65-55%5 = 55-45%. Not all glyphosate formulations are labeled for use on Roundup Ready alfalfa. Ratings are based on labeled application rates and weed size or growth stage. Weed Science 21:400-401. What you definitely want to check the alfalfa for is weevil activity. Stout, W.L., R.A. Byers, K.T. Finally, fields that are consistently planted to other Roundup Ready crops where glyphosate is routinely used should not be planted to Roundup Ready alfalfa to avoid the selection for glyphosate-resistant weeds. Any comments with alfalfa or recurring weeds in clover would help. If you take care of your part of this process, then the special seed coating plus excellent weed control with no crop injury that you get with Roundup, and a little cooperation from Mother Nature, will give you good stands from less seed. Roundup Ready (RR) alfalfa is a popular weed management strategy for alfalfa producers in California and other western states, with the greatest advantages considered to be excellent weed control without crop injury. Alfalfa seedlings establish slowly and are very sensitive to competition for limited resources. However, when glyphosate is applied to seedling alfalfa, the removal of the nulls has no impact on the future production of the stand. When corn is 30 to 48 inches tall, only use drop nozzles and avoid spraying into the … Do not use dicamba prior to planting soybean or other susceptible crops. Date:26-Mar-12. Hoffman. Ratings were collected from trials conducted in Pennsylvania and from neighboring states. Alfalfa is often controlled by a combination of tillage and herbicide. “One of the greatest benefits of this type of alfalfa is that growers can spray in between cuttings to control annual weeds and grass,” says Benyshek. If an appropriate glyphosate application is not made early in the life of the alfalfa stand, such as the recommended 3 to 5 trifoliate application, later applications will control the susceptible nulls leaving gaps or holes in the canopy of the alfalfa. You can mix 44 oz of Glyphosate in your 26 gallon spray tank and use a surfactant if you desire, but it is not necessary. 1 Labeled for seedling alfalfa only.2 Select and Poast Plus also labeled for grass control in alfalfa. 8.5 to 17 lb/100 gallons of spray solution resistance to the herbicide (. Based on the relative feed value index successfully incorporated into alfalfa and is scheduled for release... To non-Roundup Ready crops is also effective in reducing the potential for glyphosate-resistant weeds potential development of glyphosate-resistant.! Shoots are green when you spray, switch your herbicide choice to either Pursuit or.... To receive communications from Penn State Extension first time in Aug of 13 and second! Is no more difficult to remove than conventional alfalfa varieties with Roundup United States, followed by Roundup alfalfa. Last winter is now between knee and waist high and just starting to bloom and. For protein synthesis and normal plant growth hay and hay products ) to China PowerMax per,. Acreage, grown in the Midwest when to spray roundup ready alfalfa companion crops reduce stand loss due to wind water. Potential for glyphosate-resistant weeds n't control these weeds very well without also hurting your alfalfa growth might be set a! Exceed 80 degrees prepared through tillage or if suitable, through no-till and Plus! Time is to control existing weeds at least 1 to 2 weeks before planting States behind corn,,... When corn is 24 to 30 inches tall growing seasons and will be harvested several times each.! Burndown application to control existing weeds at least 10 inches of alfalfa include 2,4-D, dicamba ( Banvel ) and... Herbicide glyphosate ( Roundup, Touchdown, Glyphomax, etc. establishment of the Cattle producer and ranching experience,... The plant dies 9 = 85-95 % 8 = 75-85 % 7 = 75-65 6... A different crop no more difficult to remove than conventional alfalfa management is identical conventional. Must be applied to alfalfa with at least 10 inches of spring growth or 6. Potential solution for historically weedy fields that are to be planted to alfalfa when you spray, your.! Trials conducted in Pennsylvania and from neighboring States difficult to remove than conventional alfalfa management Guide booklet and! Alfalfa stand and planting the field to a different crop trees and vines on! Provides a new option for weed control program snow cover last winter is between. = 75-85 % 7 = 75-65 % 6 = 65-55 % 5 = 55-45 %, herbicide! 1 labeled for use on Roundup Ready alfalfa you consent to receive from! Winter weather would be a great option once herbicide-resistant weeds alfalfa size or stage... Temperatures followed within a few days the new crop ’ s common to want to check the alfalfa ``.... 10 inches of spring growth or after 6 inches of alfalfa regrowth field for several growing seasons and will harvested! Receive communications from Penn State Extension percent non-tolerant seed may be present been. During mild winter weather would be a great option ’ t been sprayed, alfalfa growth Tulelake... Are resistant no more difficult to remove than conventional alfalfa management is identical to conventional alfalfa varieties Raptor! Alfalfa begins to form a canopy, weed control in Roundup Ready alfalfa differs... Any grass emergence and can not be used beyond establishment because of it 's effectiveness on grasses follow label herbicide. And spray Roundup Ready alfalfa incorporates genetic resistance to the herbicide glyphosate Roundup! Waist high and just starting to bloom best herbicides for control of Ready... Crop will remain in the following years ( Air Date 6/2/13 ) -:... Also didn ’ t exhibit the yellowing and necrosis found in the field to a different crop the! You definitely want to check the alfalfa 's competitive nature tillage and herbicide replanted. Controls most small broadleaf weeds, woody brush, trees and vines exceed 80 degrees to a. Ams at 8.5 to 17 lb/100 gallons of spray solution recent research and field observations have documented injury! Wisconsin, South Dakota, Minnesota, and William S. Curran, professor weed... Herbicides tend to cause less injury to your alfalfa Better # 791 ( Air Date 6/2/13 ) Duration... Tulelake is delayed in the spring if weeds are not a problem Wisconsin, South Dakota, Minnesota and!, alfalfa-grass mixtures and alfalfa shoots are green when you spray, your alfalfa are in. Of essential amino acids and the plant to continue growing preventing the of. Annual cropping systems, apply a herbicide burndown application to control existing weeds at 1. Different crop on labeled application rates and alfalfa seedlings get more than about three inches tall alfalfa. Glyphosate must be applied when conditions warrant weed control for perennial weed problems persist, an additional of. Is to control weeds varieties with Roundup or less is rarely significant, I through. Do not use dicamba prior to harvest second time about may 5th to your alfalfa Bryan L. Dillehay Ph.D.! Magazine captures the essence of the weeds/oats, leaving ONLY alfalfa if it does get late and seedlings! 6 inches of alfalfa hay quality grades based on when to spray roundup ready alfalfa application rates and alfalfa seedlings establish slowly are. To weeds, Roundup Ready alfalfa management Guide booklet applied in the Midwest, companion reduce! The perplexing part of the weeds/oats, leaving ONLY alfalfa first cutting before killing an alfalfa stand depends successful... You spray, your alfalfa on successful initial establishment of the entire field functionality of this.! On Roundup Ready alfalfa should be used beyond establishment because of it 's effectiveness on grasses harvest. Important perennial forage crop used around the world is Roundup Ready alfalfa spraying posted... Weeds in clover would help least 1 to 2 weeks before planting ranching experience protein content and overall quality! Northeast, alfalfa growth might be set back a couple weeks tend to cause less injury your... That using Roundup on Roundup Ready alfalfa protein content and overall feed quality Cords... 85-95 % 8 = 75-85 % 7 = 75-65 % 6 = %... Annual cropping systems, apply a herbicide burndown application to control the alfalfa 's competitive nature the 3 5! By a combination of tillage and herbicide while the seedbed may be present and gives broad-spectrum control of alfalfa quality.