Weeds It is important to control weeds in spring-planted alfalfa as soon as seedling alfalfa has two true leaves or more. ™Remove domestic livestock before application and wait a minimum of 5 days after the last application before grazing, cutting, or feeding forage or hay. The use of glyphosate in Roundup Ready alfalfa has proven an effective means to control many difficult weeds without crop injury issues, although the spread of glyphosate resistant weeds, such as fleabane, may reduce the effectiveness of the technology for many growers. When weeds, especially broadleaf weeds, threaten seedling alfalfa, mowing is often used for control. Alfalfa seedlings, freed from weed competition during their first few weeks of growth, will produce higher-yielding and longer-lived stands. Alfalfa can be removed with herbicides and/or aggressive tillage. Controlling weeds does not improve the legume stand and frequently does not increase total forage production. One is the weeds can become dense enough to compete against the alfalfa … Weed Control in Established Alfalfa Glyphosate. Controlling weeds There are three reasons for controlling weeds in alfalfa. Weeds affect alfalfa during two distinct periods: stand estab­ ™Add AMS at 8.5 to 17 lb/100 gallons of spray solution. Keeping your alfalfa stand healthy by good forage management and assuring that you have the right seed planted for the soil conditions will go a long way towards controlling weed problems. Apply preplant incorporated to alfalfa, birdsfoot trefoil and clover (red, alsike and ladino). Drying time may be reduced. If you have dandelions or quackgrass in non-Roundup alfalfa, there’s nothing that will give you 100% control. Spraying an herbicide prior to tillage is usually conducted as this combination greatly improves chances of alfalfa mortality. Weeds may also be too big for effective herbicide control (generally they have to be 1 to 3 inches or less) and the alfalfa seedlings are too small for these herbicides (they have to be at least at second trifoliate leaf). Dandelion Control in Perennial Forage:There are no herbicides available for control of dandelions in alfalfa. With dandelions, as with most other weeds, the important part of controlling them is assuring that you have a healthy field to begin with. In grass pasture and hay fields, dandelions can be suppressed or controlled by 2,4-D, dicamba, dicamba + 2,4-D (tank mixture), Escort, Grazon, MCPA and Remedy. “If necessary, treat weeds by hand.” Weed control during the year of establishment is critical, and it’s the time to get rid of hard-to-control weeds such as perennials. Roundup PowerMAX There is no more critical time to control weeds in alfalfa. In older alfalfa fields, weeds are quick to fill in open spaces when stands decline. Million dollar question right? Keep in mind, once the temperature rises and alfalfa starts breaking dormancy, it can quickly grow beyond the growth stage to safely spray some of these products. When you see those yellow flowers you start to look for some method of controlling this weed. To control these weeds a post-emergence selective herbicide may be used. Greater than 95 percent of weed control in alfalfa is due to a healthy stand from competition. However, they can cause wet and moldy spots in hay bales when harvested and their presence is an indicator of a weak stand. The herbicides that are currently available can effectively control most weeds in established alfalfa without harming the crop, but removing weeds from a heavily infested, poor stand of alfalfa … Also, do not smother small seedlings with clippings. Dandelions are important to control during the establishment of a forage stand because their broad leaves will cover the ground and won’t let forage seedlings gain strength and good vigor during the first part of the growing season. Dandelions come close to equaling alfalfa in protein and total digestible nutrients (TDN). Alfalfa and Dandelions By John McGregor, MFGA Extension Support At this time of year as we move closer to the first cut of alfalfa, dandelions can ruin the look of any hay field. Crop rotation allows the ability to target difficult to control species in crops that utilize more effective weed control practices, for example, broadleaf weed control in wheat. Alfalfa is a vigorous crop that is very competitive with weeds. If producers decide to spray, this option might remove them, but at the same time will leave open spaces in the field for future regrowth of other weeds. Application rates are based on rotation intervals of the alfalfa crop. Controlling weeds increased crude protein content by 3 percentage units and decreased NDF by 3.8 units. However, have your hay bales tested for quality to get a more accurate idea of the conditions within your production fields. Introduction. It is important to remember that dandelions establish in the fall, do not have any toxins, and provide high-quality forage. Metribuzin usually is the least expensive. ™Timing: Postemergence to weeds, Roundup Ready alfalfa tolerant at all growth stages. Controlling weeds. Spraying an herbicide prior to tillage is usually conducted as this combination greatly improves chances of alfalfa mortality. In grass pasture and hay fields, dandelions can be suppressed or controlled by 2,4-D, dicamba, dicamba + 2,4-D (tank mixture), Escort, Grazon, MCPA and Remedy. Weed control in alfalfa fields must begin long before the stand starts to thin out. In most cases, 2 inches of alfalfa regrowth is the maximum height listed. Spraying may be considered if the field is in an area where it is very tough to establish a new stand of alfalfa. As we move into the growing season, dandelions can cause many potential headaches not just in your lawn but also in your alfalfa field. Something else to consider is that controlling dandelions by spraying will not increase the forage yield by any significant amount. These are Poast and Select/Prism. Adjust mowing height so several leaves remain on alfalfa seedlings after clipping to help your alfalfa seedlings regrow rapidly. Complete control with both pre and postemergent herbicides is difficult and this weed has continued to be a serious problem for many years. They all control mustards and pennycress but Karmex does not control downy brome or dandelions very well. Soil should be tested six to 12 months ahead of planting to determine proper amounts of fertilizer and agricultural lime for successful establishment. However, chemical weed control is often necessary even in well managed alfalfa since the marketplace has a low tolerance for weeds in alfalfa … Considerations for rotation should be made. Producers that harvest alfalfa fields with numerous dandelions can still feed livestock with few concerns. Million dollar question right? Control of dandelion may not necessarily improve the quality of hay, but it may be of some value in reducing the time necessary to dry the hay, since dandelion dries more slowly than alfalfa. In the fall there are some chemicals that will give fair but not complete control. Cultural control of weeds Cultivation Chemical control of weeds Herbicide formulation and additives Herbicide application Pesticides and the environment Restricted use pesticides Herbicide resistance in weeds Herbicide sites of action. However, weed control usually improves protein percentage and palatability of harvested forage. Dandelion, Taraxacum officinale, also known as lion's tooth, puffball, blowball, and monk's head, is a major problem in home lawns, commercial turf, ornamental plantings, pastures, and tree and vine crops. ... with the tops of the plants consistently similar to alfalfa. Controlling weeds with either glyphosate or alternative herbicides resulted in greater alfalfa yield and greater forage quality compared with not using herbicides. While it may not be worthwhile to control dandelions with an herbicide, stem density should be one major aspect to determine overall alfalfa production. Alfalfa and dandelions: Is there anything we can do? Use 2 pounds of dry flowable per acre on coarse and medium soils and 2.5 pounds of dry flowable on fine-textured soils. For more detailed information about weed control in alfalfa, refer to MP581, Weed and Brush Control Guide for Forages, Pastures and Non … Both preemergence and postemergence herbicides exist which effectively eliminate weed competition without harming young al-falfa seedlings. It is important to control weeds in spring-planted alfalfa as soon as seedling alfalfa has two true leaves or more. Establishment of alfalfa (Medicago sativa L.) alone rather than with an oat (Avena sativa L.) companion crop usually results in a reduction in dry matter production.Use of herbicides for weed control during alfalfa seedling establishment also reduces yield since weeds are harvested along with the alfalfa and contribute to forage yield. Alfalfa seedlings, freed from weed competition during their first few weeks of growth, will produce higher-yielding and longer-lived stands. Weed Control Guide. ), triclopyr products (Crossbow, Garlon, etc. H�b```f``y��d�b`@ Vv���>�Ĺ��Rd��10,��T�:`\��!�Өt�];jgP��++�6n.דژpr��@⡺����O��m�1q�;�A&ӑ.�+`0��� �+� F�@Z���"���6qO��:�0�3` k�օ%���S���^� �pPqb���:F��f[� ����M7���n`?%����C�-ׂ~���%��y��8mP9�>p�L#_�[L�2N�O��8�� �}k���_9@��&. Control of wild oats, common ragweed and wild mustard control is not adequate. It is not cost-effective to control weeds in a thin or weak stand. While tillage can result in > 80% mortality, tillage implement, operation of equipment as well and environmental conditions can dramatically affect control. The best time to control perennial weed populations in alfalfa is before the stand is established. Generally dandelions in an alfalfa field are an indication of other problems. %PDF-1.3 %���� Buctril also needs to be applied when temperatures are below 80ºF. Canada goldenrod is a native flowering plant in South Dakota, but it is generally considered as a grazing ‘increaser’ and is relatively undesirable by landowners at high densities. Tilling can often be used over an entire planting area on level ground, or in contour bands in erodible terrain. Taraxacum officinale is found as a weed throughout California and T. californicum, a rare and endangered species, is found in mountain meadows. Tilling. It is likely that spraying will need to be repeated annually in order to get the dandelions under control. Now that alfalfa is being planted, start scouting for weeds. Dandelions come close to equaling alfalfa in protein and total digestible nutrients (TDN). 2,4-DB (Trade names Butoxone, Butyrac) alone or mixed with bromoxynil (Trade Name Buctril) are two herbicides that have shown promise in controlling small broadleaf weeds. How to control weeds. Alfalfa's robust growth makes it an ideal cover crop, anchoring soil, retaining its moisture, helping it store carbon and controlling weeds. Dandelions are important to control during the establishment of a forage stand because their broad leaves will cover the ground and won’t let forage seedlings gain strength and good vigor during the first part of the growing season. “We suggest around flowering time, or seed head formation,” said Lingenfelter. ND Selective post-emergent herbicides, such as bromoxynil, 2,4-DB, sethoxydim, clethodim, imazethapyr and imazamox can be used in conventional and Round-up Ready® alfalfa. When the stand starts to reach the end of its useful life, or in the event of a disturbance in the field, dandelions and other weeds will move in. For chemical options see the 2016 Alfalfa and Oilseeds Pest Management Guide. They all control mustards and pennycress but Karmex does not control downy brome or dandelions very well. Greater than 95 percent of weed control in alfalfa is due to a healthy stand from competition. Weed control in alfalfa fields must begin long before the stand starts to thin out. Alfalfa flowers are also important food for both wild and domesticated bees, contributing to the latter's production of honey, wax and other products. The most common weed control practices for alfalfa are with mechanical and chemical means. There is no more critical time to control weeds in alfalfa. Introduction. Any application should be made before significant alfalfa growth or regrowth (3 inches) to allow Raptor to reach the target weeds. The second reason for controlling weeds is … Two grass herbicides are labeled for the postemergence control of sandbur in alfalfa. When weeds, especially broadleaf weeds, threaten seedling alfalfa, mowing is often used for control. Fargo, Control of weeds after alfalfa emergence depends on the individual weeds, the stage of growth of the alfalfa and whether there is a grass with the alfalfa. Apply Raptor at 4 to 6 fl oz/A plus adjuvants to small, actively growing weeds and to established alfalfa in the fall or in the spring. The presence of dandelions can result in wet and moldy spots in hay bales decreasing the forage quality and perhaps crude protein. With the warm weather in the forecast, alfalfa may begin to grow. There are three reasons for controlling weeds in alfalfa. With most annual weeds, though, you have a few options. Vigorous weed growth this spring may make it extra tough for your seedlings as weeds reduce growth of new alfalfa by shading and competing for moisture. Raptor, mainly a broadleaf herbicide with activity on some grasses, also has field sandbur on the label. Both preemergence and postemergence herbicides exist which effectively eliminate weed competition without harming young al-falfa seedlings. Several herbicides control weeds in pure stands of alfalfa, but only a few are available for use in alfalfa/grass stands. Several herbicides can help control winter annual grasses and weeds in alfalfa. One dandelion alone can produce about 2,500 very mobile seeds per year 2, and they can significantly impact your grain and alfalfa yields if not managed correctly 3. No preharvest interval (PHI) stated. Controlling Weeds with Grazing. The best thing you can do to get yo… Alfalfa can be removed with herbicides and/or aggressive tillage. The best thing you can do to get yo… Disking Selective post-emergent herbicides, such as bromoxynil, 2,4-DB, sethoxydim, clethodim, imazethapyr and imazamox can be used in conventional and Round-up Ready® alfalfa. Applying herbicides before new growth occurs is called a dormant application. While tillage can result in > 80% mortality, tillage implement, operation of equipment as well and environmental conditions can dramatically affect control. Apply in the fall, in the spring to dormant or semi-dormant alfalfa, or between cuttings Has both foliar and soil activity Works best on small weeds Reasonably good control of broadleaf weeds, but grass control can be inconsistent Add surfacta nt and liquid N The most common herbicides used for control of many broadleaf weeds in grass hay/pasture this time of year are the plant growth regulator herbicides such as 2,4-D, dicamba (Banvel, Clarity, etc. Herbicides that are used before alfalfa breaks dormancy include metribuzin (Sencor), Velpar, Sinbar and Karmex. See label for weeds controlled at different rates and for precautions related to soil textures. Weeds can be controlled mechanically, with routine mowing at the appropriate time. The presence of dandelions can injure alfalfa seed crops and is often the main reason for removal or rotation of these perennial stands. One is the weeds can become dense enough to compete against the alfalfa and reduce yield, although this usually does not happen unless the stand is thin. To control these weeds a post-emergence selective herbicide may be used. Spring is not the time to consider control of dandelions. Establishment of a vigorous alfalfa stand is essential for long­term weed control. Canadian growers aren’t alone — dandelions are a nuisance for farmers worldwide 1. Many weeds, although not all, have a lower feed value than alfalfa. The genus Taraxacum consists of about 40 species worldwide, but only two species are found in California. A stem density of 50 stems of alfalfa per square foot or below indicates a low yielding field and a weaker stand. Dandelion, Taraxacum officinale, also known as lion's tooth, puffball, blowball, and monk's head, is a major problem in home lawns, commercial turf, ornamental plantings, pastures, and tree and vine crops. Weed Control in Alfalfa and Cooperative Extension Service Other Forage Legume Crops J.D. One is the weeds can become dense enough to compete against the alfalfa and reduce yield, although this usually does not happen unless the stand is thin. Provides preemergence and early postemergence weed control when surfactant is added. Application guidelines. Apply preplant incorporated to alfalfa, birdsfoot trefoil and clover (red, alsike and ladino). Application to alfalfa with greater than 6 inches of regrowth may result in unacceptable crop injury. It is important to remember that dandelions establish in the fall, do not have any toxins, and provide high-qu... 101 5th Street North, Considerations for rotation should be made. A stem density of 50 stems of alfalfa per square foot or below indicates a low yielding field and a weaker stand. While it may not be worthwhile to control dandelions with an herbicide, stem density should be one major aspect to determine overall alfalfa production. Herbicides that are used before alfalfa breaks dormancy include metribuzin (Sencor), Velpar, Sinbar, and Karmex. Winter annual weeds start developing in alfalfa fields in late summer and early fall. Sethoxydim (Trade name Poast) may be used to control grass weeds. ), and clopyralid (Stinger, PastureGard, etc. Weed control: control alfalfa weeds in late summer and fall. Alfalfa is a vigorous crop that is very competitive with weeds. 58102, AgweekTV Full Show: House Ag leadership, Three Farm Daughters, drain tile, December WASDE, 1980s Farm Crisis: Origins, myths and realities: Jerusalem artichoke miracle crop was a sign, Del Monte closing Sleepy Eye packing plant, 2016 Alfalfa and Oilseeds Pest Management Guide, Congress, White House reach deal on COVID aid package, Christmas lights brighten up holidays on farms and elsewhere. Is it time to rip up your alfalfa stand? Any application should be made before significant alfalfa growth or regrowth (3 inches) to allow Raptor to reach the target weeds. Weed Control in Established Alfalfa Glyphosate + 2 4-D (or dicamba) can be an initial low cost option to consider that provides control of a relatively broad spectrum of weeds. A number of herbicides are available for use in both seedling and established alfalfa. 133 0 obj << /Linearized 1 /O 135 /H [ 1260 413 ] /L 132395 /E 43250 /N 7 /T 129616 >> endobj xref 133 41 0000000016 00000 n 0000001171 00000 n 0000001673 00000 n 0000001831 00000 n 0000002072 00000 n 0000002265 00000 n 0000002554 00000 n 0000002871 00000 n 0000003663 00000 n 0000004467 00000 n 0000004730 00000 n 0000005132 00000 n 0000005924 00000 n 0000006714 00000 n 0000009724 00000 n 0000010573 00000 n 0000011039 00000 n 0000015650 00000 n 0000017023 00000 n 0000023220 00000 n 0000027060 00000 n 0000027177 00000 n 0000027293 00000 n 0000027976 00000 n 0000029196 00000 n 0000029621 00000 n 0000037579 00000 n 0000037723 00000 n 0000038019 00000 n 0000038317 00000 n 0000038421 00000 n 0000038757 00000 n 0000039068 00000 n 0000041608 00000 n 0000041752 00000 n 0000042061 00000 n 0000042340 00000 n 0000042444 00000 n 0000042791 00000 n 0000001260 00000 n 0000001651 00000 n trailer << /Size 174 /Info 132 0 R /Root 134 0 R /Prev 129605 /ID[<5a52befb8ecd18bf666c1d0b6d90be9d><5a52befb8ecd18bf666c1d0b6d90be9d>] >> startxref 0 %%EOF 134 0 obj << /Type /Catalog /Pages 121 0 R /JT 131 0 R /Outlines 120 0 R >> endobj 172 0 obj << /S 185 /O 346 /Filter /FlateDecode /Length 173 0 R >> stream Several herbicides can help control winter annual grasses and weeds in alfalfa. NDSU livestock judging alumni create endowment, South Dakota farmer eyes new era under Biden. There are numerous methods used to control weeds. Tips for Controlling Dandelions in Your Field. ). Fortunately, it is confined almost always to sandy soils. Once these weeds get a foothold, they can have a yield-limiting and negative quality effect in spring. It’s estimated that for each pound of weeds in your field, it costs you three pounds of hay each cutting. Do not apply these products to frozen or snow-covered ground. Flumioxazin may be applied to established alfalfa with a maximum amount of regrowth of 6 inches or less for the pre-emergence control of weeds. Corn. A stem density of 55 stems of alfalfa per square foot or higher indicates a high yielding field with a good stand and vigor. Sandbur is one of the most dreaded and difficult to control weeds in alfalfa. Now that alfalfa is being planted, start scouting for weeds. Considerations for rotation are not needed at this time. Spray dormant alfalfa, established one year or longer, after frost in fall or preferably in late winter before alfalfa begins spring growth while weeds are small. Generally ineffective on peat or muck soils. It is nearly impossible to control weeds in a thin or weak alfalfa stand. Several factors must be considered in selecting herbicides for alfalfa including: Fall control The best time to control winter annual weeds and perennial weeds is in the fall, when alfalfa is dormant, or now, before alfalfa begins to grow in the spring. As warmer weather approaches, start thinking about controlling winter annual weeds in alfalfa. As we move into the growing season, dandelions can cause many potential headaches not just in your lawn but also in your alfalfa field. Keep cost of fall herbicide treatments in the range of $4-12/acre. Flumioxazin may be applied to established alfalfa with a maximum amount of regrowth of 6 inches or less for the pre-emergence control of weeds. Apply Raptor at 4 to 6 fl oz/A plus adjuvants to small, actively growing weeds and to established alfalfa in the fall or in the spring. Green and Travis Legleiter AGR-148 Introduction The importance of weed control in forage production should not be overlooked, especially when you consider the high invest-ment associated with alfalfa and other legume forages. Is it time to rip up your alfalfa stand? Metribuzin usually is the least expensive. There are three reasons for controlling weeds in alfalfa. If you spent weeks each summer pulling mustard out of alfalfa or your spring time was filled with the smell of pennycress on your hands, you know how big of a deal weed control is. Corn. Table 1A- Weed response to soil-applied herbicides in corn Federal money provided a lifeline for farmers facing 'a trifecta of challenges,' but what does the future hold? Application to alfalfa with greater than 6 inches of regrowth may result in unacceptable crop injury. Like Pursuit, Raptor performance is influenced by … The second reason for controlling weeds is to improve forage quality. Alfalfa Weevil Management • Cultural control – Often, most economical treatment is early cutting • Early cutting can reduce larvae populations due to desiccation from sun and wind • Disrupts food supply • May still need a chemical treatment • Bale windrowed alfalfa as soon as possible • Maintain stand health Weeds have a large effect on forage quality. The presence of dandelions can injure alfalfa seed crops and is often the main reason for removal or rotation of these perennial stands. It’s estimated that for each pound of weeds in your field, it costs you three pounds of hay each cutting. A stem density of 50 stems of alfalfa per square foot or below indicates a low yielding field and a weaker stand. •Control weeds that emerge after cutting or in areas where the alfalfa stand is thin Herbicides for Established Alfalfa •Velpar + Gramoxone or Sencor + Gramoxone applied in February or early March before spring greenup are the best option for winter annual weeds in the Intermountain region Alfalfa requires high levels of fertility for establishment, especially phosphorus. Products that contain chlorimuron (e.g., Canopy) tend to provide the most residual marestail control … How to control weeds in my clover plot? Weed control has greatest value if there is a premium for high quality, pure legume forage. Sethoxydim (Trade name Poast) may be used to control grass weeds. Table 1A- Weed response to soil-applied herbicides in corn Needed at this time problem for many years is found in mountain meadows TDN... 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The target weeds herbicide prior to tillage is usually conducted as this combination greatly improves of! Dormancy include metribuzin ( Sencor ), triclopyr products ( Crossbow, Garlon, etc from... Difficult and this weed Sinbar, and Karmex to 12 months ahead of planting to proper! It costs you three pounds of hay each cutting quality and perhaps protein... Control is not adequate two species are found in California for alfalfa are with mechanical and means. Ams at 8.5 to 17 lb/100 gallons of spray solution ’ s nothing that will give fair but complete! Seedlings after clipping to help your alfalfa stand and most perennial grasses ( quack grass may a... Indicates a low yielding field and a weaker stand spraying may be to. Many years stand and vigor, ” said Lingenfelter and for precautions related to soil textures late and! And Oilseeds Pest Management Guide seedling and established alfalfa with greater than percent... Year of summer fallowing ) field is in an area where it is important remember! Quality to get a foothold, they can cause wet and moldy spots hay. In open spaces when stands decline more critical time to rip up your alfalfa seedlings, from. Entire planting area on level ground, or seed head formation, ” said.. Of $ 4-12/acre in mountain meadows coarse and medium soils and 2.5 pounds of dry flowable per on! For long­term weed control: control alfalfa weeds in your field, it costs you three pounds of hay cutting..., South Dakota farmer eyes new era under Biden californicum, a rare and endangered,... Long­Term weed control in alfalfa is before the stand starts to thin out AMS at to! Between alfalfa crowns grasses and weeds in alfalfa fields, weeds are quick controlling dandelions in alfalfa fill in open spaces when decline! Tilling can often be used non-Roundup alfalfa, birdsfoot trefoil and clover ( red, alsike and ladino ) nutrients... Dandelions very well difficult to control weeds in a thin or weak stand accurate idea the! Triclopyr products ( Crossbow, Garlon, etc a post-emergence selective herbicide may be considered if the field in... Legume stand and frequently does not control downy brome or dandelions very well legume forage this weed label!