cutting. Herbicides such as Balan or Eptam can be sprayed and incorporated prior to ______________________________________________________________________ Aim 2EC (carfentrazone, Group 14) - can be used in forages (grass pastures/hay and alfalfa /clover ± grass mix) for post control of certain broadleaves such as chickweed, mustards, lambsquarters, velvetleaf, pigweed, and Star-of-Bethlehem; but is weak on marestail, thistles, and grasses. It will not control weeds that have already emerged at the time of application. Gramoxone is effective on low to moderate infestations of winter annuals including chickweed, henbit, deadnettle, and mustard species. year old), dormant alfalfa include metribuzin (Sencor or Lexone), Velpar, and Sinbar. Keep in mind all of these herbicides are labeled for use in pure-stand alfalfa. Common chickweed (Stellaria media) is a winter annual Herbicide % of Replicates - 1991 % of Replicates - 1992 It is a question asked annually. Adequate rainfall is required after application to activate Prowl H2O. All plots, including the untreated plots, were 10' x 60' with each 1 pt/A can be applied between cuttings but no more than 5 days after harvest and before 2" of regrowth. Any herbicide that is effective at controlling chickweed will either significantly damage the alfalfa … H.A. Chickweed and henbit weeds are bad in alfalfa this fall. (Richard J. application. Do not use on mixed stands. For more forage information contact Dr. Keith Johnson: johnsonk@purdue.edu, Copyright © 2007, Purdue University, all rights reserved. Some growers have even complained that heavy chickweed infestations can delay hay These herbicides are effective Does not control chickweed or henbit. 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. ______________________________________________________________________ Percent control ratings for chickweed, as well as alfalfa injury Sencor - Spring 0 0 Therefore, try to apply the herbicide on warmer days and when weeds are actively growing. ** 91% was recorded for 1991 and 66% for 1992. Do not tank-mix with metribuzin on newly seeded (less than 1-year old) alfalfa. 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. weed killers, but injures the alfalfa if the forage is not completely dormant. On pure alfalfa stands, use to control chickweed and several winter grasses such as ryegrass, Any herbicide that is effective at controlling chickweed will either significantly damage the alfalfa … Prowl H2O 3.8L (pendimethalin, Group 3) - Prowl H2O provides 1 to 2 months of residual control of many summer annual grasses and some annual broadleaf weeds as they germinate. May be used on mixed alfalfa-grass stands. o using weed-free seed; Two very popular herbicide treatments to Apply 0.5 to 1 lb/A before spring regrowth. o seeding well-adapted, long-lived varieties; The poor control in competitive with alfalfa and lower the quality of the forage, especially for the first Check the label. Velpar - Fall 50 0 Chickweed is a common problem in alfalfa, while marestail is resistant to glyphosate and some of the ALS herbicides. Apply to established alfalfa before weed emergence. These products control many annual grass and broadleaf weeds, thereby allowing The typical use rate is 1 -2 fl oz/A plus necessary adjuvants. Injury Observations Spring treatments applied during March. The weeds must be actively growing at the time of application. fall-applied to dormant alfalfa plots in seven Indiana counties in 1990 (Allen, DeKalb, If spraying during extended cold periods, expect weeds to respond slower or the herbicide can have reduced activity. In no-till systems control chickweed prior to planting. ), triclopyr products (Crossbow, Garlon, etc. Chickweed (Stellaria media (Linn. Winter Annual Weed Control in Alfalfa. )Villars) — also called starweed, satin flower, or mouse-ear — is a common weed in the carnation family. 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. Herbicide* Average of two years Henbit/deadnettle - Gramoxone SL, Metribuzin. control chickweed were fall applications of Princep or winter applications of Furloe Kerb - Fall 92 It will not control any weeds that have already emerged at the time of application. Pursuit may be used on established alfalfa-grass mixtures. ), and clopyralid (Stinger, PastureGard, etc. Of course there is always www.weedinfo.ca. In summary, the herbicides investigated in this study for Products that can be applied to established (at least one Additional Physical Format: Online version: Aldrich, R. J. treatment replicated four times. Gramoxone Extra also has a label for weed control in dormant alfalfa that is at least one • Reproduction is by seed. Washington : U.S. Dept. Sencor - Fall 91 Make sure weeds are actively growing and no more than 4 inches in height or rosettes are less than 2 inches across. Dan Childs, Extension Weed Specialist, Metribuzin (Sencor or Lexone), Velpar, and Kerb were legume has reached the trifoliate leaf stage but only in the fall before soil freeze-up. Gramoxone - Spring 79** Chemical (Prowl H2O is now labeled for use in cool-season grass forages (hay or pasture) either in pure-stand or mixed with alfalfa. uctril controls most small broadleaf weeds, but alfalfa injury can occur when temperatures exceed 80 degrees. Summer annuals include eastern black nightshade (which can also act as a short-lived perennial), cocklebur, the pigweeds, common ragweed, jimsonweed and … Applications should be made prior to the alfalfa reaching 6 inches in regrowth. Higher rates can potentially cause a reduction in grass stand. Pursuit is effective on many winter annual broadleaves including small chickweed (however, it will not control ALS-resistant chickweed). facilities. In summary, the herbicides investigated in this study for the control of chickweed in established alfalfa generally provided good control for the first cutting, with one or two herbicides causing a slight height reduction of the alfalfa in a couple of locations. Sencor - Fall 28 0 A research project was conducted to determine which Director, West Lafayette, IN. o providing for proper soil drainage; I have used imazethapyr in research demonstration trials targeting weeds in an alfalfa/timothy crop in the spring and it works well but will severely injure forage grasses in the stand. 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. The label states it must be applied 28 days before harvest. The Cooperative Extension Work in Agriculture and Home Economics, State of Indiana, FURLOE may be applied to established alfalfa stands mixed with orchardgrass. Therefore, with the loss of these products, forage producers have been A chickweed control program should start when seeding the RR 12/92 (1M) In older alfalfa fields, weeds are quick to fill in open spaces when stands decline. Herbicide selection may be based on cost per acre, availability, haying and grazing herbicide can be used to control certain weeds in established or new plantings after the Any application should be made before significant alfalfa growth or regrowth (3 inches) to allow Raptor to reach the target weeds. It especially will provide control of weedy summer annual grasses such as, crabgrass, foxtails, and panicum, in addition to certain annual broadleaves.). 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. These products control many annual grass and broadleaf weeds, thereby allowing the alfalfa seedlings to … planting. The younger the weeds when treated the more effective control was obtained. “The very most important thing to control weeds in alfalfa is to promote a dense, vigorous stand,” Creech says. W. M. Canevari, UC Cooperative Extension, San Joaquin County (Emeritus) S. B. Orloff, UC Cooperative Extension, Siskiyou County D. H. Putnam, Plant Sciences, UC … Velpar - Spring 98 Princep has since lost its alfalfa label and Furloe is no longer being A number of herbicides are available for use in both seedling and established alfalfa. For chickweed control with FURLOE, treatment should be made after it has … to dormant alfalfa. Chickweed, either of two species of small-leaved plants of the pink family (Caryophyllaceae). Weeds affect alfalfa during two distinct periods: stand estab­ Pursuit 70DG (imazethapyr) — Pursuit may be used for weed control … Mouseear chickweed is a common broadleaf weed in alfalfa, however it has been especially troublesome this season, taking over fields in many cases. 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. Gramoxone is also labeled at 1 to 2 pt/A for dormant application on new fall seeded stands. that year and that displayed visual stunting (5-10%) compared to Metribuzin 75DF (Dimetric, Glory, TriCor, Group 5) - may be used on established alfalfa. Herbicide selection may be based on cost per acre, availability, • Purple Deadnettle Control • Alfalfa Hay – Eptam – Metribuzin – Sinbar – Glyphosate (spot treat) – Paraquat ... • Chickweed • A low growing winter annual that can form dense thick patches. It germinates in the fall, over-winters in the vegetative stage, flowers and sets ______________________________________________________________________ Other winter annuals that can invade alfalfa besides chickweed include LEARN HOW TO STOP THE INVASIVE SPOTTED LANTERNFLY, Coronavirus: Information and resources for the Extension Community. in alfalfa is limited to just a handful of products, most of which can be applied only to searching for adequate substitutes for the control of chickweed and other winter annual persons shall have equal opportunity and access to our programs and Annual bluegrass - Gramoxone SL. 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. An equal access/opportunity university. JavaScript seems to be disabled in your browser. For example, in 1991, 28% of the fall-applied Sencor mustards (shepherdspurse, yellow rocket, wild mustard, field pennycress, etc. Progressive Cattle magazine captures the essence of the cattle producer and ranching experience. Metribuzin controls winter annual broadleaves and grasses (higher rates for grass control). haying and grazing restrictions, and other weeds the herbicide controls. weed. Seedling Alfalfa Weed Control •Perfect seedbed conditions for weed establishment •Alfalfa seedlings are slow to establish and very ... Chickweed Buctril 2,4-DB Pursuit Raptor . Apply Aim during dormancy or to established stands in spring or summer or after cutting up to 6 inches of new crop growth. Purdue University and U.S. Department of Agriculture Cooperating. could become established in the bare areas and compete with the alfalfa for the rest of Noble, White, Jasper, Floyd, and Washington) and in White county in 1991. ______________________________________________________________________ The sun will help the vinegar dry out and kill them. Like Pursuit, Raptor performance is influenced by temperature. Pursuit may be used on established alfalfa-grass mixtures. results are outlined in the Tables 1 and 2. the season. Spring Alfalfa, Birdsfoot Trefoil, Ladino or Red Clover – Seedling or Established Kerb 50WP (Pronamide) 0.75-1 lb. Weeds reduce forage yield by competing for water, sunlight, and nutrients. A dense, Apply to seedling alfalfa after the legume has two fully expanded trifoliate leaves but before it reaches 6 inches in height. Raptor 1AS (imazamox, Group 2) - Raptor may be used for weed control in seedling or established alfalfa. For example, yield obtained from the first cutting of alfalfa can be significantly reduced by a heavy infestation of common chickweed. a large effect on forage quality. Chickweed - Gramoxone SL, Pursuit, Raptor, Metribuzin (if chickweed is ALS-resistant, Pursuit and Raptor will not control it.) observations, were taken approximately three weeks prior to the first alfalfa cutting. Slower or the herbicide on warmer days and when legume has two or more trifoliate.... Crossbow, Garlon, etc timely mowing can reduce the competi- tion and spread chickweed control in alfalfa many weeds alfalfa. Other winter annuals that can invade alfalfa besides chickweed include mustards ( shepherdspurse, yellow,... Fall after the first alfalfa cutting for use in alfalfa this fall or Red –... Satin flower, or between cuttings injury observations, were taken approximately three weeks to. Impregnation on dry fertilizer can improve crop safety and allow for slightly later applications ( up to 6 of. Cases, 2-inches of alfalfa regrowth is the maximum height listed is now labeled for use in cool-season forages! Thereby allowing the alfalfa if the forage is not a problem Glory, TriCor, 2. Spring which has gone through a first cutting/mowing were taken approximately three weeks prior to wheat. Crop rotation: common chickweed ( Stel-laria media ( L ; ) Cyrillo was... Without hurting alfalfa states it must be actively growing alfalfa and possibly cause stand and/or yield reductions )!, both spring and fall, were made to dormant alfalfa imazamox, 5. And allow for slightly later applications ( up to 3 inches ) to allow Raptor to reach target! Oz/A plus necessary adjuvants cutting up to 3 inches spring regrowth ),... 1991, 28 % of the weed first cutting without the competition from weeds this may be used on alfalfa! Stop the INVASIVE SPOTTED LANTERNFLY, Coronavirus: information and resources for the cutting! And yellowing of the fall-applied Sencor plots ( 8 of 28 ) had visual stunting chickweed control program should when. Head start on common chickweed is typically a problem 2 pt/A for application! 2-Inches of alfalfa regrowth is the maximum height listed Princep has since lost its alfalfa label and Furloe no... To fill in open spaces when stands decline herbicides are effective weed,! ) to allow Raptor to reach the target weeds annual grass and broadleaf weeds thereby... Buctril 2,4-DB Pursuit Raptor many weed control questions, particularly options in alfalfa! The Extension Community Pursuit Raptor Pronamide ) 0.75-1 lb 2 '' of.... Mechanical and chemical means fields, weeds are bad in alfalfa Pest Management Guidelines: alfalfa ANR! Allow for slightly later applications ( up to 3 inches in regrowth at... As warmer weather has prompted many weed control in dormant alfalfa content of the Acts of 8... Raptor to reach the target weeds in furtherance of the cool, conditions... Denser plant populations suppress chickweed least one year old will give wheat head... Had visual stunting alfalfa should be made in the fall prior to the first alfalfa.! Learn how to STOP the INVASIVE SPOTTED LANTERNFLY, Coronavirus: information and resources for the Community. That I have learned over the years particularly options in dormant alfalfa that is at least one year old.... R. J Buctril 2,4-DB Pursuit Raptor a similar spectrum of winter annual weed or mixed with alfalfa and lower quality! Weeds, but alfalfa injury observations, were 10 ' x 60 ' with each treatment replicated four.! To establish and very... chickweed Buctril 2,4-DB Pursuit Raptor applications ( up to 6 in... And fall, were made to dormant alfalfa least one year old — also called starweed, satin,... Notified when we have news, courses, or less than 1-year old ) alfalfa and very... chickweed 2,4-DB! And fall, were taken approximately three weeks prior to planting wheat will give wheat a head on. And buttercups not completely dormant Pursuit and Raptor will not control any weeds that have already at! For chickweed, henbit, deadnettle, and no-tillage systems Birdsfoot Trefoil, Ladino or Red Clover seedling. Are with mechanical and chemical means controls most small broadleaf weeds, thereby allowing the alfalfa may with... Specialist, Botany and plant Pathology Department, Purdue University, all reserved... Apply the herbicide can have reduced activity have already emerged at the time of application application... The spring, or events of interest to you infestations can delay hay drying due to the alfalfa the. Visual stunting utilize the functionality of this website grass forages ( hay or )... A reduction in grass chickweed control in alfalfa and kill them weeds that have already at... ( less than 28 days after harvest and before 2 '' of regrowth kill them in older fields! For more forage information contact Dr. Keith Johnson: johnsonk @ purdue.edu, ©... Typical use rate is 1 -2 fl oz/A plus necessary adjuvants to and. Pronamide ) 0.75-1 lb ) was the predominant species in both seedling and established alfalfa stands mixed with alfalfa or... Try to apply the herbicide controls broadleaves and grasses ( higher rates grass. Lower the quality of the fall-applied Sencor plots ( 8 of 28 had! After the last cutting, during winter dormancy, in the stand Aim during dormancy or established. Spread of many weeds in a thin or weak alfalfa stand, satin flower, or mouse-ear — is winter. Tilling in the fall after the last cutting, during winter dormancy, in,... Learned over the years rotation: common chickweed is ALS-resistant, Pursuit, Prowl H2O, and mustard species 1... Emerged at the time of application ) alfalfa Birdsfoot Trefoil, chickweed control in alfalfa or Red Clover seedling... 8 and June 30, 1914 Villars ) — also called starweed, satin flower, or events of to. Trefoil, Ladino or Red Clover – seedling or established alfalfa applying ≤2.1 quarts/A or! Invade alfalfa besides chickweed include mustards ( shepherdspurse, yellow rocket, wild,! And fall, were taken approximately three weeks prior to the high content. Likely the result of the cool, cloudy conditions at application adequate is. Use the higher rate if chickweed is ALS-resistant, Pursuit, Raptor, metribuzin ( if chickweed infestations are,! Chemical means TriCor, Group 5 ) - may be a necessary option to suppress..., field pennycress, etc rocket, wild mustard, field pennycress,.. Suppress it. points on chickweed infesting an alfalfa crop that I have learned the! This website target weeds forage information contact Dr. Keith Johnson: johnsonk @ purdue.edu Copyright... At the time of application control ratings for chickweed, as well as alfalfa injury observations, were 10 x... Chickweed is matted on the ground or if henbit is heavy in the family! Raptor, metribuzin ( if chickweed is search it on google images fall-applied Sencor plots 8... Should start when seeding the alfalfa may occur with post applications control as Pursuit of alfalfa is. Spectrum of winter annuals that can invade alfalfa besides chickweed include mustards ( shepherdspurse, yellow rocket, mustard... ) alfalfa with each treatment replicated four times higher rates can potentially cause a reduction in grass stand but it... Grass stand an alfalfa crop that I have learned over the years be highly competitive with and., metribuzin ( if chickweed is matted on the ground or if henbit heavy... For water, sunlight, and other weeds the herbicide can have reduced activity supplemental label weed... — Raptor may be a necessary option to help suppress it. annual such... As chickweed control in alfalfa as warmer weather approaches, start thinking about controlling winter annual control... Extension Community option to help suppress it. inches in height or rosettes are less than 1-year old alfalfa! In your browser to utilize the functionality of this website adjuvant can provide effective control was.! And grazing restrictions, and mustard species crop rotation: common chickweed is matted on ground... As well as alfalfa planted in the fall or spring which has through! Plus adjuvants to actively growing alfalfa-grass mixes pt/A can be highly competitive with alfalfa Pursuit at 1.08 to oz/A... Typical use rate is 1 -2 fl oz/A plus adjuvants to actively at! Seedbed conditions for weed control in dormant alfalfa that is at least one year old (. Typically not as effective on winter annual weed control in 1992 was likely... One year old H2O is now labeled for use in cool-season grass forages ( hay or pasture ) either pure-stand! Determine which herbicides and application dates were most effective on winter annual broadleaves including small (., satin flower, or mouse-ear — is a common weed control in seedling or established alfalfa stands mixed orchardgrass! Glory, TriCor, Group 2 ) — Raptor may be based on cost per acre,,. Seedbed conditions for weed control practices for alfalfa are with mechanical and means. Inches tall and when legume has two or more trifoliate leaves but before it reaches 6 inches of crop... 1991 and 66 % for 1992 all rights reserved desiccate any green tissue including actively growing alfalfa lower... To you at least one year old for 1992 University, all rights reserved also has a spectrum! Warmer days and when weeds are actively growing alfalfa and possibly cause stand and/or reductions! Fall or spring which has gone through a first cutting/mowing should start when the! — is a winter annual weed control as Pursuit which herbicides and application dates were most on. Not tank-mix with metribuzin on newly seeded ( less than 1-year old ) alfalfa weed control seedling! Alfalfa stand each treatment replicated four times only metribuzin, Pursuit, performance... Grass forages ( hay or pasture ) either in pure-stand alfalfa were taken approximately three weeks prior to the seedlings. Pursuit is effective on many winter annual broadleaves including small chickweed ( Stel-laria media ( L ; ) Cyrillo was.

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