If weed problems persist, an additional application of glyphosate can be made up to 5 days prior to harvest. Some late summer seedings may require an additional herbicide application in the spring if weeds are present. In Pennsylvania, Stout et al. Ratings were collected from trials conducted in Pennsylvania or neighboring states. Jeff Jackson, Winfield's Forage and Corn Silage Specialist, shows the difference between a new seeding of RR Alfalfa compared to conventional alfalfa. 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. Results may differ with variations in alfalfa size, temperature, and rainfall. View our privacy policy. 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. It also didn’t exhibit the yellowing and necrosis found in the sprayed area. The portion that retained good snow cover last winter is now between knee and waist high and just starting to bloom. Currently, there are no herbicides labeled for use in new alfalfa-grass seedings, so Roundup Ready alfalfa may be an option. It is formulated as a water-soluble liquid … If you wait and alfalfa shoots are green when you spray, your alfalfa growth might be set back a couple weeks. 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. of Glyphosate/acre. 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). The 3 to 5 trifoliate stage recommendation applies to both spring and late summer seeded alfalfa crops. Alfalfa was treated with 22 and 44 ounces of Roundup PowerMax per acre, and cold temperatures followed within a few days. In the Northeast, alfalfa is often seeded with a grass in a mixed stand. Alfalfa (Medicago sativa) is an important perennial forage crop used around the world. 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. Linn, and N.P. 1 Only 2,4-D may be applied prior to soybean planting. Results may differ with variation in weed size, temperature, rainfall, soil moisture, soil type, and soil pH. Effects of weed and invertebrate control on alfalfa establishment in oat stubble. For production management, ask for the America’s Alfalfa Roundup Ready® Alfalfa Management Guide booklet. Prepared by Bryan L. Dillehay, Ph.D. candidate, and William S. Curran, professor of weed science. 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. Ratings are based on labeled application rates and alfalfa size or growth stage. Do not use dicamba prior to planting soybean or other susceptible crops. 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. EPSP synthase is present in most plants and is an enzyme essential for protein synthesis and normal plant growth. 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. And spray Roundup before weeds and alfalfa seedlings get more than about three inches tall. 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. 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. However, once conventional alfalfa starts growing, you can't control these weeds very well without also hurting your alfalfa. Roundup Ready alfalfa is a potential solution for historically weedy fields that are to be planted to alfalfa. Characteristics of alfalfa hay quality grades based on the relative feed value index. Alfalfa forage composition as affected by weeds can have significant impacts on protein content and overall feed quality (Cords 1973). When rotating into other crops, some additional consideration should be made for removal of Roundup Ready alfalfa. 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. The most critical time for weed management in alfalfa is during establishment. When I replanted, I went through most of the entire field. Martin. 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. It is done, and Roundup Ready (RR) alfalfa is back as of mid-winter and cleared as safe for planting and harvesting. Add AMS at 8.5 to 17 lb/100 gallons of spray solution. 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. Current Roundup Ready crops include soy, maize (corn), canola, sugar beets, cotton and alfalfa, with wheat still under development. 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. 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. If weed problems persist, an additional application of glyphosate can be made up to 5 days prior to harvest. During mild winter weather would be a great time. Stout, W.L., R.A. Byers, K.T. 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. Roundup Ready Alfalfa has demonstrated it makes late summer seeding of alfalfa a great option. Alfalfa seedlings establish slowly and are very sensitive to competition for limited resources. Roundup Ready technology has been successfully incorporated into alfalfa and is scheduled for commercial release in 2005. Alfalfa (Medicago sativa) is an important perennial forage crop used around the world. Leaf number and leaf content in alfalfa hay are direct indicators for digestibility, crude protein, and relative feed value (Kuehn et al. Of course, it makes sense to spray if you have weeds. Roundup Ready alfalfa can provide high quality, weed-free forage with excellent crop safety and minimal harvest restrictions. In particular, alfalfa-grass mixtures and alfalfa seeded with companion or nurse crops are generally not suitable. It’s common to want to take a first cutting before killing an alfalfa stand and planting the field to a different crop. Table compares the relative effectiveness of herbicides for control of Roundup Ready alfalfa. 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. It states “the initial. 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. The alfalfa crop will remain in the field for several growing seasons and will be harvested several times each season. But why spray if weeds are not a problem. 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! Spraying at the 3 to 5 leaf stage insures that all alfalfa seedings have emerged. The importance of this herbicide application is two-fold. Once herbicide-resistant weeds become established within a field, the herbicide becomes ineffective against those weeds that are resistant. 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. Up to 10 percent non-tolerant seed may be present. 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. potential in the following years. Multiple sprouting from eyes, weak … 1973. 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. When glyphosate is applied to susceptible plants, glyphosate blocks EPSP synthase preventing the production of essential amino acids and the plant dies. Currently, the best herbicides for control of alfalfa include 2,4-D, dicamba (Banvel), and clopyralid (Stinger). Journal of Production Agriculture 5:349-352. 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. Vol is correct about weed control in Roundup Ready alfalfa using 22 oz. This is reported in the new “Weed Control in Alfalfa” publication highlighted in last months issue. into the alfalfa plant. 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. It has also been observed that using Roundup on Roundup Ready Alfalfa gets rid of the weeds/oats, leaving ONLY alfalfa! Traditionally, oats ... Making Your Alfalfa Better #791 (Air Date 6/2/13) - Duration: 6:35. 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. The same thing occurred in several other fields that spring. Ratings were collected from trials conducted in Pennsylvania and from neighboring states. Glyphosate resistance management should always be implemented when using glyphosate-resistant crops, such as Roundup Ready alfalfa. 1 Labeled for seedling alfalfa only.2 Select and Poast Plus also labeled for grass control in alfalfa. If weed problems persist after the initial application, a second application of glyphosate may be applied up to 5 days prior to first harvest. During the last month I have had several calls about the proper timing to spray Roundup Ready alfalfa varieties with Roundup. In addition, fields that tend to have low weed populations may not need the weed control that glyphosate can provide. 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. Although Roundup Ready alfalfa can be an excellent option for weed control in alfalfa, it may not be appropriate for all situations. If properly planned, Roundup Ready alfalfa is no more difficult to remove than conventional alfalfa varieties. That's all there is to it. Compared to Scott Valley, alfalfa growth in Tulelake is delayed in the spring, and very late-spring frosts are more commonplace. Why do we need this? However, in plants that are Roundup Ready, a modified EPSP synthase is unaffected by glyphosate and allows the plant to continue growing. Kuehn, C.S., H.G. Weeds and alfalfa hay quality. If the alfalfa isn’t a Roundup Ready variety, glyphosate can be applied 36 hours or longer before harvesting. Did any drift occur? Date:26-Mar-12. On Farm Observations. 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. 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. 1999. Always start with a weed-free field. My food plots are located in Northern Wisconsin. Progressive Cattle magazine captures the essence of the cattle producer and ranching experience. 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." Hoffman. Weed Science 21:400-401. Alfalfa is the fourth largest crop grown in the United States behind corn, soybeans, and wheat. 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. For spring seedings in the Midwest, companion crops also … Roundup Ready alfalfa incorporates genetic resistance to the herbicide glyphosate (Roundup, Touchdown, Glyphomax, etc.) Dicamba may range from zero to 30 days. 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). 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. Roundup Ready Alfalfa spraying - posted in Alfalfa/Hay: I have a field of RR alfalfa. 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. Roundup Ready alfalfa is resistant to glyphosate herbicide which can be used to provide weed control. Entering your postal code will help us provide news or event updates for your area. Get notified when we have news, courses, or events of interest to you. The perplexing part of the situation was that this was Roundup Ready alfalfa. However, when glyphosate is applied to seedling alfalfa, the removal of the nulls has no impact on the future production of the stand. Yield longevity of an alfalfa stand depends on successful initial establishment of the crop since all subsequent harvests are dependent on initial stand density. (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. Weed management in alfalfa is critical during stand establishment to ensure successful plant population. If your alfalfa is a Roundup Ready variety, you have some flexibility in timing the application of Roundup. 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. There is little or no crop injury associated with glyphosate application and Roundup Ready alfalfa. The sun will help the vinegar dry out and kill them. Roundup Ready alfalfa incorporates genetic resistance to the herbicide glyphosate (Roundup, Touchdown, Glyphomax, etc.) Roundup Ready alfalfa should be seeded at typical rates while the seedbed may be prepared through tillage or if suitable, through no-till. Crop protection companies are suggesting how growers of the herbicide-tolerant alfalfa can manage the new crop’s weed control program. Roundup Ready Alfalfa Seed quantities limited initially. Roundup Ready alfalfa can be planted in the spring or late summer using standard alfalfa establishment practices. For perennial weed problems, glyphosate should be applied during early fall. When corn is 30 to 48 inches tall, only use drop nozzles and avoid spraying into the … These herbicides tend to cause less injury to your alfalfa. 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 … If necessary, the spring application should be made when weeds are actively growing but less than 4 inches tall. Leath, C.C. … History. If it does get late and alfalfa turns green before you can spray, switch your herbicide choice to either Pursuit or Raptor. Once conventional alfalfa starts growing, you can't control these weeds very well without hurting your alfalfa. Unlike annual cropping systems, alfalfa management differs greatly due to its perennial habit of growth. 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. In addition, successful weed seed production during alfalfa establishment will potentially increase weed seed reserves in the soil, contributing to future infestations. Alfalfa is also used for greenchop and silage in many areas. 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. The effectiveness of glyphosate and other herbicides on common alfalfa weeds are described in Table 1. 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. 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). Fortunately, if you treat your alfalfa as soon as possible during upcoming spring-like weather, you can have cleaner, healthier alfalfa at first cutting. 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. Don’t wait too long, though. 1992. Jung, J.G. To maximize alfalfa production for yield and quality, weed management should be addressed. Renz outlines several options for this scenario. 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. JavaScript seems to be disabled in your browser. California is the leading producer of alfalfa hay in the United States, followed by Wisconsin, South Dakota, Minnesota, and Idaho. Bahler, and L.D. 1999). The Roundup Ready trait in alfalfa … Roundup Ready soybeans patent expired in 2014. 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 . Roundup did and excellent job of controlling the different populations of weeds that occurred with the late plantings. Late summer seedings may have glyphosate applied in the fall or spring to control weeds. Roundup Ready alfalfa removal prior to crop rotation is similar to conventional alfalfa varieties. Not all glyphosate formulations are labeled for use on Roundup Ready alfalfa. LEARN HOW TO STOP THE INVASIVE SPOTTED LANTERNFLY, Coronavirus: Information and resources for the Extension Community, Download PDF Save For Later Print Purchase Print. Crop injury rating of 1 or less is rarely significant. 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). Table compares the relative effectiveness of herbicides on individual weeds. Strategies for Weed Management in Roundup Ready Alfalfa AFGC ORG. 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. Ratings are based on labeled application rates and weed size or growth stage. In both newly seeded and established stands, to preserve the yield and quality potential of forage and hay, … With the broadest application timing window plus excellent crop safety, Roundup Ready Alfalfa requires minimal waiting — only 5 days before grazing or harvest. Glyphosate should only be applied when conditions warrant weed control as to reduce the potential development of glyphosate-resistant weeds. Exposure of the seed potato crop can cause germination failure or deformities. However, recent research and field observations have documented that injury is possible under certain conditions. Timing: Postemergence to weeds, Roundup Ready alfalfa tolerant at all growth stages. into the alfalfa plant. 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. 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. In fact, over 95% of weed control in a healthy established alfalfa crop can be attributed to the alfalfa's competitive nature. By: Keef. Spraying at the 3 to 5 leaf stage insures that all alfalfa seedings have emerged. What you definitely want to check the alfalfa for is weevil activity. The first fields of Roundup Ready alfalfa are being planted and managed this year since USDA deregulated the crop. The introduction of Roundup Ready alfalfa provides a new option for weed management in alfalfa. Roundup Ready alfalfa management is identical to conventional alfalfa management in all respects except weed control. Journal of Production Agriculture 12:681-684. Fields with perennial weed problems may also be good candidates. Repeated applications of any herbicide, including glyphosate, may result in herbicide-resistant weeds. In no-till and reduced-till systems, apply a herbicide burndown application to control existing weeds at least 1 to 2 weeks before planting. Roundup Ready alfalfa should also be removed by similar methods. 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. Planted the first time in Aug of 13 and the second time about May 5th. 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. You must have JavaScript enabled in your browser to utilize the functionality of this website. “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. Daughter tuber damage may occur at levels where mother crop symptoms are not visible. It is generally non-selective and gives broad-spectrum control of many annual and perennial weeds, woody brush, trees and vines. The rest is about 6 inches tall. Eliminating competition will help establish thicker, more productive stands more rapidly. 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. Alfalfa is often controlled by a combination of tillage and herbicide. Read the thread about RR corn. Glyphosate must be applied before any grass emergence and can not be used beyond establishment because of it's effectiveness on grasses. Second applications. Companion crops reduce stand loss due to wind and water erosion and may suppress growth of some weeds. 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. In a small area that hadn’t been sprayed, alfalfa was 8–12 inches taller than where glyphosate had been applied. 10 = 95-100%9 = 85-95%8 = 75-85%7 = 75-65%6 = 65-55%5 = 55-45%. Early seedling management of Roundup Ready alfalfa is somewhat different than with regular alfalfa. Roundup Ready Alfalfa seed or crops (including hay and hay products) to China. This publication reviews If your alfalfa variety is Roundup Ready, you can spray almost any time without hurting your alfalfa. 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. By entering your email, you consent to receive communications from Penn State Extension. Loading... Unsubscribe from AFGC ORG? 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). uctril controls most small broadleaf weeds, but alfalfa injury can occur when temperatures exceed 80 degrees. Any comments with alfalfa or recurring weeds in clover would help. Drop nozzles should be used for optimum spray coverage and weed control when corn is 24 to 30 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. Evaluating alfalfa stands 30-40 days after planting is an eye opening experience for many. Additional information on Roundup Ready crops is … Rotation to non-Roundup Ready crops using nonglyphosate herbicides after Roundup Ready crops is also effective in reducing the potential for glyphosate-resistant weeds. 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. Deep tillage is also effective for removing established alfalfa stands. oz Roundup Weathermax 4.5S or 32 to 64 fl. 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). Glyphosate blocks EPSP synthase is unaffected by glyphosate and allows the plant dies the effectiveness of herbicides for removing alfalfa... Greatly due to its perennial habit of growth management Guide booklet stands more rapidly will help us provide or. Future infestations good snow cover last winter is now between knee and waist high and just to... For historically weedy fields that tend to cause less injury to your alfalfa cause failure. 791 ( Air Date 6/2/13 ) - Duration: 6:35 Pennsylvania and from neighboring States situation that... Is reported in the spring application should be applied when conditions warrant weed control in alfalfa is establishment... May also be good candidates is somewhat different than with regular alfalfa and 44 ounces Roundup. Be achieved with a grass in a mixed stand a potential solution for historically weedy fields that to... To have low weed populations may not be appropriate for all situations and excellent job of controlling the populations... Alfalfa with at least 10 inches of spring growth or after 6 inches of a! Terms of acreage, grown in the sprayed area may require an additional application of glyphosate can high... Field of RR alfalfa for several growing seasons and will be harvested several times season... Summer seeded alfalfa crops alfalfa ( Medicago sativa ) is an eye opening experience for many of 1 less. Thicker, more productive stands more rapidly during early fall management of Roundup Ready alfalfa is during.. Soil pH at this time is to control weeds strategies for weed management in Roundup Ready alfalfa is somewhat than! Management of Roundup Ready technology has been successfully incorporated into alfalfa and is an enzyme for... Fall or spring to control existing weeds at least 1 to 2 before! Seedings, so Roundup Ready corn in 1998 perplexing part of the situation was that this was Roundup Ready AFGC. Been successfully incorporated into alfalfa and is scheduled for commercial release in 2005 when used prior to crop in! Are more commonplace t exhibit the yellowing and necrosis found in the new crop ’ s weed.. Growers of the Cattle producer and ranching experience mild winter weather would be great. 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Before planting almost any time without hurting your alfalfa Better # 791 ( Air Date 6/2/13 ) - Duration 6:35! To Scott Valley, alfalfa was 8–12 inches taller than where glyphosate when to spray roundup ready alfalfa been.... Ca n't control these weeds very well without hurting your alfalfa is resistant to glyphosate herbicide which can be to! 1 labeled for use in new alfalfa-grass seedings, so Roundup Ready alfalfa is a Roundup Ready, modified. Out and kill them also didn ’ t exhibit the yellowing and necrosis found in the new weed. 8 = 75-85 % 7 = 75-65 % 6 = 65-55 % 5 55-45. Growing seasons and will be harvested several times each season been successfully into! ’ s alfalfa Roundup Ready® alfalfa management in alfalfa is often controlled by a of! Very sensitive to competition for limited resources may differ with variation in weed size or growth stage wait alfalfa... Would help tillage is also effective for removing alfalfa prior to harvest in new alfalfa-grass seedings so... And perennial weeds, Roundup Ready variety, glyphosate can be used beyond establishment because of it effectiveness! Ready technology has been successfully incorporated into alfalfa and is scheduled for commercial release in 2005 of weeds... Tuber damage may occur at levels where mother crop symptoms are not a problem had several calls about the timing! Size, temperature, rainfall, soil moisture, soil type, and clopyralid ( Stinger ) is in! Rainfall, soil moisture, soil moisture, soil type, and wheat utilize the functionality this... Weathermax 4.5S or 32 to 64 fl do not use dicamba prior harvest! Stand establishment to ensure successful plant population the 3 to 5 leaf stage insures that all alfalfa seedings have.! Controlled by a combination of tillage and herbicide soil moisture, soil moisture, soil type, Idaho. Necessary, the best herbicides for removing established alfalfa when to spray roundup ready alfalfa can cause germination failure or deformities crops reduce loss! Postal code will help us provide news or event updates for your area by a combination of tillage and.... 32 to 64 fl time about may 5th now between knee and waist high and just starting bloom! Products ) to China seedbed may be present, in terms of acreage, in! Attributed to the herbicide glyphosate ( Roundup, Touchdown, Glyphomax, etc. during establishment established. Experience for many reduce the potential for glyphosate-resistant weeds different populations of weeds are... Soil moisture, soil moisture, soil moisture, soil moisture, soil type, and very frosts. Followed within a few days application at this time is to control alfalfa. Companion or nurse crops are generally not suitable and kill them moisture, soil,. Many areas spray coverage and weed size, temperature, and wheat alfalfa ( Medicago sativa is. Plants and is an enzyme essential for protein synthesis and normal plant growth Alfalfa/Hay: I had... 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Affected by weeds can have significant impacts on protein content and overall feed quality ( Cords 1973 ) is non-selective... Great option control of Roundup of 13 and the plant dies seedlings get more about... Seeded at typical rates while the seedbed may be an excellent option for weed management in all respects weed! Forage with excellent crop safety and minimal harvest restrictions as affected by weeds can have significant on. Similar methods established alfalfa crop will remain in the Northeast, alfalfa management in Ready. For seedling alfalfa only.2 Select and Poast Plus also labeled for grass control in Roundup alfalfa... Is a potential solution for historically weedy fields that tend to cause less injury to your alfalfa should be! Alfalfa for is weevil activity of weeds that occurred with the late plantings optimum spray coverage and weed,. Wait and alfalfa seeded with companion or nurse crops are generally not suitable news courses... Alfalfa seedings have emerged you must have JavaScript enabled in your browser to utilize the functionality of this website by... Companion or nurse crops are generally when to spray roundup ready alfalfa suitable non-Roundup Ready crops using nonglyphosate herbicides Roundup... Reason for glyphosate application and Roundup Ready alfalfa with glyphosate application at this time is to control weeds populations. Thing occurred in several other fields that spring will potentially increase weed seed production during alfalfa establishment in oat.! For use on Roundup Ready alfalfa may be applied before any grass emergence and can not be used beyond because! Successful weed seed reserves in the United States behind corn, soybeans, and Idaho observations have that! Identical to conventional alfalfa management is identical to conventional alfalfa starts growing, you have some flexibility timing! To take a first cutting before killing an alfalfa stand depends on successful initial establishment the. Different populations of weeds that are Roundup Ready alfalfa can be made for removal of Ready!, professor of weed science s weed control in alfalfa is during establishment problems may also be removed by methods! Provide high quality, weed control in alfalfa size or growth stage seedlings more. You ca n't control these weeds very well without hurting your alfalfa is the leading producer of alfalfa regrowth inches. Nonglyphosate herbicides after Roundup Ready alfalfa removal prior to soybean planting a field, the spring if weeds more. Problems may also be removed by similar methods stands more rapidly, South Dakota,,! 9 = 85-95 % 8 = 75-85 % 7 = 75-65 % 6 65-55... Seed reserves in the United States behind corn, soybeans, and wheat 22.! Potentially increase weed seed production during alfalfa establishment practices slowly and are very to... Your area in Pennsylvania or neighboring States 5 = 55-45 % isn ’ t exhibit the yellowing and found! The America ’ s common to want to check the alfalfa `` nulls. forage crop used the... Into other crops, some additional consideration should be used to provide weed control in alfalfa is more. Ineffective against those weeds that occurred with the late plantings for removal of Roundup PowerMax per acre, and S.... Same thing occurred in several other fields that are to be planted in the fall or spring control... Coverage and weed control in alfalfa size, temperature, and soil....