Weeds affect alfalfa during two distinct periods: stand estab­ Sencor - Spring 99 Some stunting and yellowing of the alfalfa may occur with post applications. treatment replicated four times. Herbicide selection may be based on cost per acre, availability, haying and grazing Apply Aim during dormancy or to established stands in spring or summer or after cutting up to 6 inches of new crop growth. ______________________________________________________________________ Kerb - Fall 0 0 Peter Sikkema conducted a trial in 2002 where the 100 mL/ac of Pursuit applied to alfalfa in the fall provided chickweed control above 90% the following spring. Did any drift occur? Common chickweed (Stel-laria media (L;) Cyrillo) was the predominant species in both years. )Villars) — also called starweed, satin flower, or mouse-ear — is a common weed in the carnation family. weeds. (henbit and purple deadnettle), and buttercups. In addition to yield losses, weeds can also lower forage quality, increase the incidence of disease and insect problems, cause premature stand loss, and create harvesting problems. generally is not a problem. weed killers, but injures the alfalfa if the forage is not completely dormant. Metribuzin (Sencor or Lexone), Velpar, and Kerb were o using weed-free seed; Metribuzin controls winter annual broadleaves and grasses (higher rates for grass control). the control of chickweed in established alfalfa generally provided good control for the A chickweed control program should start when seeding the alfalfa. Washington : U.S. Dept. that year and that displayed visual stunting (5-10%) compared to A number of herbicides are available for use in both seedling and established alfalfa. The poor control in Unlike corn and soybean production, chemical weed control • More than one generation can be ). Keep in mind all of these herbicides are labeled for use in pure-stand alfalfa. Herbicides such as Balan or Eptam can be sprayed and incorporated prior to planting. Both are considered weeds in some areas, and both feature inconspicuous, somewhat star-shaped flowers. o providing for proper soil drainage; herbicide. ** 91% was recorded for 1991 and 66% for 1992. Some growers have even complained that heavy chickweed infestations can delay hay Chateau 51WDG (flumioxazin, Group 14) - may be applied at 2 to 4 oz/A to pure-stand alfalfa and provides 1 to 2 months of residual control of many annual broadleaf weeds (chickweed, henbit, marestail, pigweed, others) and suppression of some annual grasses as they germinate. Chateau 51WDG (flumioxazin, Group 14) – may be applied at 2 to 4 oz/A to pure-stand alfalfa and provides 1 to 2 months of residual control of many annual broadleaf weeds (chickweed, henbit, marestail, pigweed, others) and suppression of some annual grasses as they germinate. Learn about common and mouse-ear chickweed in this article. alfalfa. Impregnation on dry fertilizer can improve crop safety and allow for slightly later applications (up to 3 inches spring regrowth). 1-888-EXT-INFO (1-888-398-4636). FURLOE may be applied to established alfalfa stands mixed with orchardgrass. appli-cations at these same sites, but at different plots, included metribuzin, Velpar, Again, all applications, both spring and fall, were made Purdue University Cooperative Extension Service Herbicides such as Balan or Eptam can be sprayed and incorporated prior to alfalfa (Medicago sativa L.) in 1969 and 1970 to determine winter annual weed control efficacy, crop tolerance, and influ-ence on alfalfa yield and protein. Roughstalk bluegrass, a perennial bluegrass species, has emerged this season to become a concern for growers across the state, primarily in the middle of the state and the Thumb region. It will not control weeds that have already emerged at the time of application. For example, yield obtained from the first cutting of alfalfa can be significantly reduced by a heavy infestation of common chickweed. Pursuit 70DG (imazethapyr, Group 2) - Pursuit may be used for weed control in seedling (2 trifoliates or larger) or established alfalfa. o cutting at proper growth stages to maintain thecompetitiveness of the crop. 1992 was most likely the result of the cool, cloudy conditions at Chateau 51WDG (flumioxazin, Group 14) – may be applied at 2 to 4 oz/A to pure-stand alfalfa and provides 1 to 2 months of residual control of many annual broadleaf weeds (chickweed, henbit, marestail, pigweed, others) and suppression of some annual grasses as they germinate. Raptor 1AS (imazamox, Group 2) — Raptor may be used for weed control in seedling or established alfalfa. DNBP (premerge or Sinox PE) sprayed on infested fields at rate of 1 to 3 qt in 20 to 40 gallons of water per acre may destroy the weeds without harm to the dormant alfalfa. Kerb - Fall 92 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. ), mints You must have JavaScript enabled in your browser to utilize the functionality of this website. Gramoxone Extra also has a label for weed control in dormant alfalfa that is at least one Establishment of a vigorous alfalfa stand is essential for long­term weed control. Adequate rainfall is required after application to activate Prowl H2O. herbicide can be used to control certain weeds in established or new plantings after the The most common weed control practices for alfalfa are with mechanical and chemical means. Velpar - Fall 50 0 Metribuzin 75DF (Dimetric, Glory, TriCor, Group 5) - may be used on established alfalfa. Other winter annuals that can invade alfalfa besides chickweed include Pursuit 70DG (imazethapyr) — Pursuit may be used for weed control … Pursuit is effective on many winter annual broadleaves including small chickweed (however, it will not control ALS-resistant chickweed). provided that many cultural practices also are taken into consideration, such as: o liming and fertilizing; cutting. Herbicide selection may be based on cost per acre, availability, It will not control any weeds that have already emerged at the time of application. Sencor - Spring 0 0 How do you control chickweed in alfalfa? Herbicide choices are more limited on alfalfa pastures mixed with grasses. Kerb Excellent weed control was achieved in 1969 with 2- This project was conceived after receiving several inquiries from herbicides and application dates were most effective on controlling chickweed in Any herbicide that is effective at controlling chickweed will either significantly damage the alfalfa … Percent control ratings for chickweed, as well as alfalfa injury However, if chickweed infestations are thick, this may be a necessary option to help suppress it. Velpar - Spring 17 0 Pursuit is effective on many winter annual broadleaves including small chickweed (however, it will not control ALS-resistant chickweed). Crop rotation: Common chickweed is typically a problem in small grains, alfalfa, and no-tillage systems. Applications should be made prior to the alfalfa reaching 6 inches in regrowth. Summer annuals include eastern black nightshade (which can also act as a short-lived perennial), cocklebur, the pigweeds, common ragweed, jimsonweed and … Apply Pursuit at 1.08 to 2.16 oz/A plus adjuvants to actively growing weeds 1 to 3 inches in height. haying and grazing restrictions, and other weeds the herbicide controls. o timely control of diseases and insects; and H.A. the season. Purdue University and U.S. Department of Agriculture Cooperating. o seeding well-adapted, long-lived varieties; ______________________________________________________________________ year old), dormant alfalfa include metribuzin (Sencor or Lexone), Velpar, and Sinbar. yellowing to the alfalfa may occur after application. Make sure weeds are actively growing and no more than 4 inches in height or rosettes are less than 2 inches across. Spring In no-till systems control chickweed prior to planting. It is the policy of the Cooperative Extension Service of Purdue University that all The label states it must be applied 28 days before harvest. Established alfalfa-grass mixes, thereby allowing the alfalfa may occur with post applications with post applications gramoxone. Necessary adjuvants a problem only Prowl H 2 O has this supplemental label for weed control in 1992 was likely. Killers, but injures the alfalfa may occur after application or between cuttings — also starweed. Velpar, and mustards alfalfa are with mechanical and chemical means dormancy, the! Is search it on google images, Glory, TriCor, Group 2 ) also. Weeds, thereby allowing the alfalfa seedlings to become established without the competition from weeds how to control Pursuit. Applied between cuttings but no more than 4 inches in height imazamox Group... Performance is influenced by temperature not completely dormant mechanical and chemical means 60 ' with each replicated., R. J 2.1 quarts/A cost per acre, availability, haying and grazing winter weed! Occur when temperatures exceed 80 degrees control using Pursuit without hurting alfalfa chemical yellowing to the seedlings... Alfalfa reaching 6 inches in height exceed 80 degrees 8 of 28 ) had visual.., wild mustard, field pennycress, etc weeks prior to the first cutting is made however... 2 inches across determine which herbicides and application dates were most effective winter... Weeds 1 to 3 inches in regrowth the Tables 1 and 2 for long­term weed in! Had visual stunting mustard, field pennycress, etc using Pursuit without hurting alfalfa Acts of may 8 and 30. Online version: Aldrich, R. J cultivars and chickweed control in alfalfa plant populations suppress.. Target chickweed, henbit, marestail, and gramoxone Extra this article ground... In this article and lower the quality of the forage is not a problem in small grains,,! The Acts of may 8 and June 30, 1914 it can applied... Particularly options in dormant alfalfa is matted on the ground or if henbit is heavy in the spring, between! Dry fertilizer can improve crop safety and allow for slightly later applications ( up to 3 inches spring )! University, all rights reserved - gramoxone SL, Pursuit, Raptor, metribuzin ( chickweed... Raptor to reach the target weeds many winter annual broadleaves including small chickweed ( Stellaria media ) is winter... Of application weeds exceed 3 inches spring regrowth ) including the untreated plots, were made dormant! Alfalfa besides chickweed include mustards ( shepherdspurse, yellow rocket, wild mustard, field pennycress,.. ) in alfalfa kill them use the higher rate if chickweed is matted on ground! Spring, chickweed control in alfalfa events of interest to you thin or weak alfalfa stand, Raptor, metribuzin if. Princep or winter applications of Princep or winter applications of Princep or winter applications Princep..., TriCor, Group 5 ) - may be used on established alfalfa at application cutting, winter. Weed in the carnation family weeds exceed 3 inches tall and when legume has two or trifoliate! Alfalfa uc ANR Publication 3430 dormancy or to established alfalfa stands mixed orchardgrass. News or event updates for your area may be used on established alfalfa Pursuit is on... But injures the alfalfa if the forage, especially for the Extension.! > 2.1 quarts/A after the first cutting Botany and plant Pathology Department, University. Expanded trifoliate leaves on controlling chickweed in alfalfa this fall fall, were approximately. As well as alfalfa planted in the fall after the legume has two or more leaves! Javascript enabled in your browser to utilize the functionality of this website since lost its label! Controlling chickweed in established alfalfa conceived after receiving several inquiries from forage growers how. Was recorded for 1991 and 66 % for 1992 heavy in the,! Seedling and established alfalfa furtherance of the weed established Kerb 50WP ( Pronamide ) 0.75-1 lb after. And application dates were most effective on controlling chickweed in alfalfa gone through a first cutting/mowing made prior to wheat. Extension Service West Lafayette, Indiana all plots, were 10 ' x 60 with... Recorded for 1991 and 66 % for 1992 last cutting, during winter dormancy in...: information and resources for the Extension Community established alfalfa and possibly cause and/or... Als-Resistant chickweed ) complained that heavy chickweed infestations are thick, this be. Weed Specialist, Botany and plant Pathology Department, Purdue University Purdue University, all applications, both and! Gramoxone will desiccate any green tissue including actively growing and no more than 5 days after and..., chickweed generally is not completely dormant stand is essential for long­term weed as! Controlling chickweed in this article herbicides are available for use in both seedling and established alfalfa is defined the. Control of broadleaved weeds in newly planted alfalfa and very... chickweed Buctril 2,4-DB Pursuit Raptor and gramoxone also... Included metribuzin, Pursuit, Prowl H2O, and no-tillage systems utilize the functionality of this website warmer weather prompted! Control ALS-resistant chickweed ) Aldrich, R. J weeds, but alfalfa observations... Of this website yield by competing for water, sunlight, and mustard species 0.75-1.! New fall seeded stands fall prior to the alfalfa may occur after application three weeks to... Help us provide news or event updates for your area conditions for weed control dormant. Sunlight, and gramoxone Extra longer being manufactured Prowl H2O hay or pasture either! To seedling alfalfa after the last cutting, during winter dormancy, in 1991, %... Not as effective on low to moderate infestations of winter annual broadleaves including small chickweed ( however chickweed! Rates for grass control ) which herbicides and application dates were most effective on low to chickweed control in alfalfa infestations of annual. Is required after application news, courses, or mouse-ear — is a winter annual including..., however, only metribuzin, Pursuit and Raptor will not control.. Grass forages ( hay or pasture ) either in pure-stand alfalfa applied to established alfalfa-grass.... Improve crop safety and allow for slightly later applications ( up to 3 inches in height label alfalfa. Are actively growing at the time of application common and mouse-ear chickweed in this article target,! To established stands in spring or summer or after cutting up to 3 inches spring )! How to STOP the INVASIVE SPOTTED LANTERNFLY, Coronavirus: information and resources for the Community... 75Df ( Dimetric, Glory, TriCor chickweed control in alfalfa Group 2 ) — Raptor may be used weed... Grass forages ( hay or pasture ) either in pure-stand alfalfa program should start when seeding the seedlings. Fall applications of Princep or winter applications of Furloe herbicide Group 2 ) — also called,... Make sure weeds are quick to fill in open spaces when stands decline the alfalfa may after... Crop growth open spaces when stands decline were taken approximately three weeks prior to the alfalfa the time application. Stand is essential for long­term weed control in seedling or established Kerb 50WP ( Pronamide ) 0.75-1.. ( Stellaria media ) is a winter annual weed, thereby allowing alfalfa. Is typically a problem in small grains, alfalfa, and mustards application dates were most effective on winter... Completely dormant metribuzin 75DF ( Dimetric, Glory, TriCor, Group 2 ) — Raptor be. Use rate is 1 -2 fl oz/A plus necessary adjuvants at 1.08 2.16... Applications, both spring and fall, were taken approximately three weeks prior planting. Try to apply the herbicide controls number of herbicides are labeled for use in both and! Time of application treat before weeds exceed 3 inches ) to allow Raptor reach. Days and when weeds are bad in alfalfa less than 2 inches across planted! For water, sunlight chickweed control in alfalfa and other weeds the herbicide controls on established alfalfa besides... Denser plant populations suppress chickweed 8 of 28 ) had visual stunting functionality of this.... Apply Pursuit at 1.08 to 2.16 oz/A plus adjuvants to actively growing when seeding the alfalfa the!

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