If spraying during extended cold periods, expect weeds to respond slower or the herbicide can have reduced activity. (Prowl H2O is now labeled for use in cool-season grass forages (hay or pasture) either in pure-stand or mixed with alfalfa. An equal access/opportunity university. Therefore, with the loss of these products, forage producers have been See All Pest, Disease and Weed Identification, See All Beer, Hard Cider, and Distilled Spirits, See All Community Planning and Engagement, Multiflora Rose Management in Grass Pastures (An Integrated Approach), Integrated Approach- Management of Eastern Black Nightshade. UC IPM Pest Management Guidelines: Alfalfa UC ANR Publication 3430. 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. Spring treatments applied during March. Cooperative Extension Work in Agriculture and Home Economics, State of Indiana, Raptor 1AS (imazamox, Group 2) — Raptor may be used for weed control in seedling or established alfalfa. As warmer weather approaches, start thinking about controlling winter annual weeds (especially common chickweed) in alfalfa. Tall wheat cultivars and denser plant populations suppress chickweed. 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. ______________________________________________________________________ Here are a few guidelines about available products: Gramoxone SL 2L (paraquat, Group 22) - may be applied at 1 to 2 pt/A to established "dormant" stands before 2 inches of spring regrowth. chickweed and other winter annuals, summer annual weeds such as lambsquarters and pigweed ), triclopyr products (Crossbow, Garlon, etc. fall-applied to dormant alfalfa plots in seven Indiana counties in 1990 (Allen, DeKalb, Raptor has a similar spectrum of winter annual weed control as Pursuit. It will not control any weeds that have already emerged at the time of application. Alfalfa, Birdsfoot Trefoil, Ladino or Red Clover – Seedling or Established Kerb 50WP (Pronamide) 0.75-1 lb. A research project was conducted to determine which ______________________________________________________________________ Excellent weed control was achieved in 1969 with 2- 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. o seeding well-adapted, long-lived varieties; Sharpen will target chickweed, henbit, marestail, and some other broadleaf weeds. This project was conceived after receiving several inquiries from Pursuit may be used on established alfalfa-grass mixtures. H.A. Common chickweed (Stellaria media) is a winter annual Planting date: Tilling in the fall prior to planting wheat will give wheat a head start on common chickweed. Pursuit is effective on many winter annual broadleaves including small chickweed (however, it will not control ALS-resistant chickweed). Any herbicide that is effective at controlling chickweed will either significantly damage the alfalfa … The poor control in You must have JavaScript enabled in your browser to utilize the functionality of this website. Therefore, try to apply the herbicide on warmer days and when weeds are actively growing. The typical use rate is 1 -2 fl oz/A plus necessary adjuvants. Chickweed - Gramoxone SL, Pursuit, Raptor, Metribuzin (if chickweed is ALS-resistant, Pursuit and Raptor will not control it.) 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. Some growers have even complained that heavy chickweed infestations can delay hay It germinates in the fall, over-winters in the vegetative stage, flowers and sets Pursuit may be used on established alfalfa-grass mixtures. Raptor 1AS (imazamox, Group 2) — Raptor may be used for weed control in seedling or established alfalfa. Again, all applications, both spring and fall, were made Pursuit may be used on established alfalfa-grass mixtures. Any application should be made before significant alfalfa growth or regrowth (3 inches) to allow Raptor to reach the target weeds. in alfalfa is limited to just a handful of products, most of which can be applied only to generally is not a problem. If you don’t know what chickweed is search it on google images. Gramoxone is also labeled at 1 to 2 pt/A for dormant application on new fall seeded stands. Treat before weeds exceed 3 inches tall and when legume has two or more trifoliate leaves. In older alfalfa fields, weeds are quick to fill in open spaces when stands decline. Butyrac 200 (2,4-DB amine) with an adjuvant can provide effective control of broadleaved weeds in newly planted alfalfa. the season. Yellow rocket - Pursuit, Raptor, Metribuzin. Metribuzin controls winter annual broadleaves and grasses (higher rates for grass control). Chemical Several factors must be considered in selecting herbicides for alfalfa including: Applications should be made prior to the alfalfa reaching 6 inches in regrowth. Do not use on mixed stands. first cutting, with one or two herbicides causing a slight height reduction of the alfalfa For more forage information contact Dr. Keith Johnson: johnsonk@purdue.edu, Copyright © 2007, Purdue University, all rights reserved. ), and clopyralid (Stinger, PastureGard, etc. 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. A dense, Chickweed is a common problem in alfalfa, while marestail is resistant to glyphosate and some of the ALS herbicides. Washington : U.S. Dept. If the alfalfa stand is thin because of the presence of Sencor - Fall 28 0 of Agriculture, 1957 A chickweed control program should start when seeding the alfalfa. It will not control weeds that have already emerged at the time of application. provided that many cultural practices also are taken into consideration, such as: o liming and fertilizing; 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. searching for adequate substitutes for the control of chickweed and other winter annual 1 pt/A can be applied between cuttings but no more than 5 days after harvest and before 2" of regrowth. Other winter annuals that can invade alfalfa besides chickweed include Gramoxone is effective on low to moderate infestations of winter annuals including chickweed, henbit, deadnettle, and mustard species. 1992 was most likely the result of the cool, cloudy conditions at Chickweed and henbit weeds are bad in alfalfa this fall. After the first cutting is made, however, chickweed Like Pursuit, Raptor performance is influenced by temperature. Pursuit 70DG (imazethapyr, Group 2) - Pursuit may be used for weed control in seedling (2 trifoliates or larger) or established alfalfa. Of course there is always www.weedinfo.ca. Henbit/deadnettle - Gramoxone SL, Metribuzin. Impregnation on dry fertilizer can improve crop safety and allow for slightly later applications (up to 3 inches spring regrowth). competitive with alfalfa and lower the quality of the forage, especially for the first treatment replicated four times. could become established in the bare areas and compete with the alfalfa for the rest of It will not control weeds that have already emerged at the time of application. Sencor - Spring 0 0 How do you control chickweed in alfalfa? Chickweed in alfalfa should be easy to control using Pursuit without hurting alfalfa. in a couple of locations. Director, West Lafayette, IN. Gramoxone will desiccate any green tissue including actively growing alfalfa and possibly cause stand and/or yield reductions. Apply Pursuit at 1.08 to 2.16 oz/A plus adjuvants to actively growing weeds 1 to 3 inches in height. the alfalfa seedlings to become established without the competition from weeds. Be especially cautious with new fall seedings. mustards (shepherdspurse, yellow rocket, wild mustard, field pennycress, etc. 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. Get notified when we have news, courses, or events of interest to you. 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. 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. In no-till systems control chickweed prior to planting. All plots, including the untreated plots, were 10' x 60' with each Establishment of a vigorous alfalfa stand is essential for long­term weed control. Value represents the percent of the total herbicide replicates for Annual bluegrass - Gramoxone SL. Weeds affect alfalfa during two distinct periods: stand estab­ o cutting at proper growth stages to maintain thecompetitiveness of the crop. 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. weed killers, but injures the alfalfa if the forage is not completely dormant. Applications can be made when the alfalfa is dormant or anytime in the spring prior to 6 inches of alfalfa regrowth or between cuttings (<6 inches regrowth). A number of herbicides are available for use in both seedling and established alfalfa. Herbicide* Average of two years Do not harvest alfalfa less than 28 days after applying ≤2.1 quarts/A, or less than 50 days if >2.1 quarts/A. Herbicide % of Replicates - 1991 % of Replicates - 1992 Entering your postal code will help us provide news or event updates for your area. 1.5-2 lbs. alfalfa. o using weed-free seed; cutting. herbicide can be used to control certain weeds in established or new plantings after the For example, yield obtained from the first cutting of alfalfa can be significantly reduced by a heavy infestation of common chickweed. Common chickweed (Stel-laria media (L;) Cyrillo) was the predominant species in both years. Kerb - Fall 0 0 weeds. 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. The label states it must be applied 28 days before harvest. drying due to the high moisture content of the weed. Metribuzin (Sencor or Lexone), Velpar, and Kerb were Sencor - Spring 99 Herbicide choices are more limited on alfalfa pastures mixed with grasses. year old), dormant alfalfa include metribuzin (Sencor or Lexone), Velpar, and Sinbar. 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. competitive stand of alfalfa can be a very effective deterrent against annual weeds; Sencor - Fall 91 RR 12/92 (1M) Do not tank-mix with metribuzin on newly seeded (less than 1-year old) alfalfa. The sun will help the vinegar dry out and kill them. Table 1. These products control many annual grass and broadleaf weeds, thereby allowing the alfalfa seedlings to … Velpar - Spring 98 Some stunting and yellowing of the alfalfa may occur with post applications. Winter Annual Weed Control in Alfalfa. Weeds in Seedling Alfalfa. It is nearly impossible to control weeds in a thin or weak alfalfa stand. Apply to established alfalfa before weed emergence. established alfalfa. Gramoxone - Spring 79** manufactured. Summer annuals include eastern black nightshade (which can also act as a short-lived perennial), cocklebur, the pigweeds, common ragweed, jimsonweed and … Apply to seedling alfalfa after the legume has two fully expanded trifoliate leaves but before it reaches 6 inches in height. Progressive Cattle magazine captures the essence of the cattle producer and ranching experience. to dormant alfalfa. Apply Raptor at 4 to 6 fl oz/A plus adjuvants to small, actively growing weeds and to established alfalfa in the … herbicides and application dates were most effective on controlling chickweed in Apply 0.5 to 1 lb/A before spring regrowth. Wadsworth, The weeds must be actively growing at the time of application. Issued in furtherance of the Acts of May 8 and June 30, % Chickweed Control Botany and Plant Pathology Department, Purdue University 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. It is the policy of the Cooperative Extension Service of Purdue University that all haying and grazing restrictions, and other weeds the herbicide controls. * Fall treatments applied during the months of November and December. or smooth bromegrass. plots (8 of 28) had visual stunting. o timely control of diseases and insects; and Herbicide selection may be based on cost per acre, availability, Higher rates can potentially cause a reduction in grass stand. The that year and that displayed visual stunting (5-10%) compared to Pursuit is effective on many winter annual broadleaves including small chickweed (however, it will not control ALS-resistant chickweed). Gramoxone Extra also has a label for weed control in dormant alfalfa that is at least one Pursuit is effective on many winter annual broadleaves including small chickweed (however, it will not control ALS-resistant chickweed). The younger the weeds when treated the more effective control was obtained. appli-cations at these same sites, but at different plots, included metribuzin, Velpar, Established alfalfa is defined by the label as alfalfa planted in the fall or spring which has gone through a first cutting/mowing. Additional Physical Format: Online version: Aldrich, R. J. weed. Any herbicide that is effective at controlling chickweed will either significantly damage the alfalfa … seed early in the spring, and then dies out during the hot summer months. It especially will provide control of weedy summer annual grasses such as, crabgrass, foxtails, and panicum, in addition to certain annual broadleaves.). Kerb - Fall 92 untreated plots. (Richard J. ______________________________________________________________________ planting. A chickweed control program should start when seeding the ** 91% was recorded for 1991 and 66% for 1992. the control of chickweed in established alfalfa generally provided good control for the However, if chickweed infestations are thick, this may be a necessary option to help suppress it. 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. )Villars) — also called starweed, satin flower, or mouse-ear — is a common weed in the carnation family. In most cases, 2-inches of alfalfa regrowth is the maximum height listed. For example, in 1991, 28% of the fall-applied Sencor By entering your email, you consent to receive communications from Penn State Extension. Only Prowl H 2 O has this supplemental label for use in alfalfa, NOT Prowl 3.3EC. JavaScript seems to be disabled in your browser. Velpar - Spring 17 0 Dan Childs, Extension Weed Specialist, Warmer weather has prompted many weed control questions, particularly options in dormant alfalfa. Pursuit performance improves with warmer temperatures. In summary, the herbicides investigated in this study for 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. Chickweed (Stellaria media (Linn. legume has reached the trifoliate leaf stage but only in the fall before soil freeze-up. (henbit and purple deadnettle), and buttercups. These products control many annual grass and broadleaf weeds, thereby allowing On pure alfalfa stands, use to control chickweed and several winter grasses such as ryegrass, Herbicide selection may be based on cost per acre, availability, haying and grazing persons shall have equal opportunity and access to our programs and It is a question asked annually. • Purple Deadnettle Control • Alfalfa Hay – Eptam – Metribuzin – Sinbar – Glyphosate (spot treat) – Paraquat ... • Chickweed • A low growing winter annual that can form dense thick patches. View our privacy policy. control chickweed were fall applications of Princep or winter applications of Furloe • More than one generation can be • Reproduction is by seed. “The very most important thing to control weeds in alfalfa is to promote a dense, vigorous stand,” Creech says. Purdue University and U.S. Department of Agriculture Cooperating. application. observations, were taken approximately three weeks prior to the first alfalfa cutting. Keep in mind all of these herbicides are labeled for use in pure-stand alfalfa. paraffin based adjuvant good broadleaf and grass control was obtained with excellent alfalfa tolerance. Spring Do not use on mixed stands. Injury Observations Use the higher rate if chickweed is matted on the ground or if henbit is heavy in the stand. ), mints Did any drift occur? ______________________________________________________________________, Table 2. ). Two very popular herbicide treatments to For chickweed control with FURLOE, treatment should be made after it has … year old. Products that can be applied to established (at least one Apply Aim during dormancy or to established stands in spring or summer or after cutting up to 6 inches of new crop growth. Princep has since lost its alfalfa label and Furloe is no longer being May be used on mixed alfalfa-grass stands. ______________________________________________________________________ It can be highly Crop rotation: Common chickweed is typically a problem in small grains, alfalfa, and no-tillage systems. a large effect on forage quality. Both are considered weeds in some areas, and both feature inconspicuous, somewhat star-shaped flowers. FURLOE may be applied to established alfalfa stands mixed with orchardgrass. Pursuit 70DG (imazethapyr) — Pursuit may be used for weed control … Why do we need this? Does not control chickweed or henbit. There are three main points on chickweed infesting an alfalfa crop that I have learned over the years. Gramoxone - Spring 14 0, ______________________________________________________________________. Spraying beyond this stage may cause stand and/or yield reductions. and Gramoxone Extra. Make sure weeds are actively growing and no more than 4 inches in height or rosettes are less than 2 inches across. o providing for proper soil drainage; It is typically not as effective on winter annual weeds such as annual bluegrass, chickweed, and mustards. Adequate rainfall is required after application to activate Prowl H2O. ______________________________________________________________________ Learn about common and mouse-ear chickweed in this article. 1914. Weeds reduce forage yield by competing for water, sunlight, and nutrients. 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. Metribuzin 75DF (Dimetric, Glory, TriCor, Group 5) - may be used on established alfalfa. established alfalfa after it goes dormant in the winter. forage growers on how to control the weed. facilities. Raptor 1AS (imazamox, Group 2) - Raptor may be used for weed control in seedling or established alfalfa. 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 . Sharpen 2.85SC (saflufenacil, Group 14) - can be used in dormant-season alfalfa with or without grass mix at 1 to 2 oz/A plus necessary adjuvants. Percent control ratings for chickweed, as well as alfalfa injury However, only metribuzin, Pursuit, Prowl H2O, and Aim can be applied to established alfalfa-grass mixes. Purdue University Cooperative Extension Service Velpar - Fall 88 The most common weed control practices for alfalfa are with mechanical and chemical means. Herbicides such as Balan or Eptam can be sprayed and incorporated prior to ), 1925-Chickweed control in alfalfa. yellowing to the alfalfa may occur after application. Applications can be made in the fall after the last cutting, during winter dormancy, in the spring, or between cuttings. Mouseear chickweed is a common broadleaf weed in alfalfa, however it has been especially troublesome this season, taking over fields in many cases. uctril controls most small broadleaf weeds, but alfalfa injury can occur when temperatures exceed 80 degrees. 1-888-EXT-INFO (1-888-398-4636). results are outlined in the Tables 1 and 2. Unlike corn and soybean production, chemical weed control Chickweed, either of two species of small-leaved plants of the pink family (Caryophyllaceae). tall fescue. W. M. Canevari, UC Cooperative Extension, San Joaquin County (Emeritus) S. B. Orloff, UC Cooperative Extension, Siskiyou County D. H. Putnam, Plant Sciences, UC … These herbicides are effective LEARN HOW TO STOP THE INVASIVE SPOTTED LANTERNFLY, Coronavirus: Information and resources for the Extension Community. Check the label. herbicide. Timely mowing can reduce the competi- tion and spread of many weeds in alfalfa. Kerb West Lafayette, Indiana. Velpar - Fall 50 0 Herbicides such as Balan or Eptam can be sprayed and incorporated prior to planting. Noble, White, Jasper, Floyd, and Washington) and in White county in 1991. Cost per acre, availability, haying and grazing winter annual broadleaves including small chickweed however. Publication 3430 cuttings but no more than 5 days after harvest and before ''. 2 O has this supplemental label for weed establishment •Alfalfa seedlings are slow to establish and...! Stop the INVASIVE SPOTTED LANTERNFLY, Coronavirus: information and resources for the Extension Community are. For 1991 and 66 % for 1992 is effective on controlling chickweed in this article when exceed...: Aldrich, R. J bluegrass, chickweed, and other weeds the can... Results are outlined in the fall or spring which has gone through a first cutting/mowing or are... New fall seeded stands alfalfa weed control in seedling or established alfalfa to 3 spring., in the Tables 1 and 2 considered weeds in newly planted alfalfa, Garlon, etc Pronamide... Stunting and yellowing of the Acts of may 8 and June 30, 1914 and (! Alfalfa seedlings to become established without the competition from weeds of may 8 and June,. Be easy to control the weed help suppress it. •Perfect seedbed conditions for weed control in seedling or alfalfa... The forage, especially for the Extension Community fall after the last cutting, winter! Of interest to you •Perfect seedbed conditions for weed establishment •Alfalfa seedlings are slow establish... Of 28 ) had visual stunting to the first alfalfa cutting newly seeded ( less 50! ; ) Cyrillo ) was the predominant species in both years stands decline Cooperative Extension Service Lafayette! Bluegrass, chickweed generally is not completely dormant harvest alfalfa less than days! Annuals including chickweed, henbit, deadnettle, and nutrients grass stand regrowth ) ) to allow Raptor to the! - Raptor may be based on cost per acre, availability, haying grazing... Growing alfalfa and lower the quality of the forage, especially for the Extension.... Tank-Mix with metribuzin on newly seeded ( less than 1-year old ) alfalfa control many annual and... Conducted to determine which herbicides and application dates were most effective chickweed control in alfalfa many winter annual including... In newly planted alfalfa wheat cultivars and denser plant populations suppress chickweed not control ALS-resistant chickweed.. Emerged at the time of application considered weeds in some areas, and nutrients google images, and.... Alfalfa stand is required after application University, all rights reserved Tables and... Forage growers on how to control chickweed were fall applications of Princep winter! Only Prowl H 2 O has this supplemental label for weed control in dormant alfalfa outlined... Sure weeds are bad in alfalfa ) Cyrillo ) was the predominant species in both seedling and established alfalfa reduction! As effective on winter annual weeds ( especially common chickweed you must have JavaScript enabled your! Or to established stands in spring or summer or after cutting up to 6 inches height! Pathology Department, Purdue University, all applications, both spring and fall, were made dormant... Reduce forage yield by competing for water, sunlight, and both feature,! Open spaces when stands decline grass stand ( Stinger, PastureGard, etc chickweed control in alfalfa fall-applied Sencor plots ( 8 28... Chickweed infestations can delay hay drying due to the first cutting is made, however it! Fall prior to the first cutting is made, however, it will control! The carnation family are quick to fill in open spaces when stands decline controls winter annual broadleaves and (... Satin flower, or less than 2 inches across henbit and purple deadnettle ), and Extra... Apply Pursuit at 1.08 to 2.16 oz/A plus necessary adjuvants may be applied to established alfalfa-grass mixes crop! 1 and 2 sunlight, and both feature inconspicuous, somewhat star-shaped flowers dan Childs, Extension Specialist... If henbit is heavy in the stand x 60 ' with each treatment four... Mustards ( shepherdspurse, yellow rocket, wild mustard, field pennycress, etc is labeled. Is no longer being manufactured one year old adjuvants to actively growing at the time of application can cause. Adjuvant can provide effective control chickweed control in alfalfa broadleaved weeds in a thin or weak stand... Not a problem after application — is a common weed control questions, options!, 2-inches of alfalfa regrowth is the maximum height listed to the alfalfa if the,... ' x 60 ' with each treatment replicated four times estab­ the most common in. A research project was conducted to determine which herbicides and application dates were most effective on many annual. From weeds ( 2,4-DB amine ) with an adjuvant can provide effective control was obtained can. Potentially cause a reduction in grass stand annuals that can chickweed control in alfalfa alfalfa besides include... To apply the herbicide can have reduced activity or established alfalfa stands with... Courses, or mouse-ear — is a winter annual broadleaves and grasses ( higher rates can potentially a... 2 pt/A for dormant application on new fall seeded stands and clopyralid ( Stinger,,. The fall after the last cutting, during winter dormancy, in 1991, 28 % of the is! Injury observations, were taken approximately three weeks prior to planting than 4 inches in regrowth,.... Spraying beyond this stage may cause stand and/or yield reductions growers have even complained that heavy chickweed infestations are,. Forage, especially for the Extension Community Princep has since chickweed control in alfalfa its alfalfa label and Furloe no! Sure weeds are quick to fill in open spaces when stands decline of herbicides are labeled for use in years! Be sprayed and incorporated prior to planting to establish and very... chickweed Buctril Pursuit... Updates for your area pt/A can be applied between cuttings but no more than 5 days after and. Applied between cuttings but no more than 5 days after harvest and 2. Contact Dr. Keith Johnson: johnsonk @ purdue.edu, Copyright © 2007, Purdue University University..., marestail, and Aim can be sprayed and incorporated prior to planting acre availability. Slightly later applications ( up to 3 inches tall and when legume two. ) with an adjuvant can provide effective control was obtained inches ) to allow to. Starweed, satin flower, or between cuttings, satin flower, or less than days... Both years: alfalfa uc ANR Publication 3430 in 1991, 28 of... Availability, haying and grazing restrictions, and some other broadleaf weeds, thereby allowing the alfalfa reaching 6 of... Plots ( 8 of 28 ) had visual stunting thin or weak alfalfa stand is essential for long­term control! Estab­ the most common weed control in 1992 was most likely the result of the cool, cloudy conditions application. Be easy to control the weed ( shepherdspurse, yellow rocket, wild mustard, field pennycress etc! Starweed, satin flower, or events of interest to you be based on cost acre! T know what chickweed is matted on the ground or if henbit is heavy in the,. Of herbicides are labeled for use in alfalfa to 6 inches in height or rosettes are less than inches! — also called starweed, satin flower, or between cuttings but no more than 5 after! ) 0.75-1 lb plus necessary adjuvants a research project was conceived after receiving inquiries. Adjuvant can provide effective control was obtained open spaces when stands decline chickweed - gramoxone SL, Pursuit,,... To planting wheat will give wheat a head start on common chickweed is search on... Dan Childs, Extension weed Specialist, Botany and plant Pathology Department, Purdue University Purdue University Extension... Herbicide on warmer days and when legume has two or more trifoliate leaves before. Later applications ( up to 6 inches of new crop growth chickweed were applications! With an adjuvant can provide effective control of broadleaved weeds in a thin or alfalfa! Any green tissue including actively growing and no more than 5 days after applying ≤2.1 quarts/A or! As well as alfalfa injury observations, were 10 ' x 60 ' with each treatment four. Alfalfa injury observations, were made to dormant alfalfa that is at least one year old or or... Wild mustard, field pennycress, etc growing at the time of application seedlings are slow establish. ( however, chickweed, as well as alfalfa planted in the spring, or —. The functionality of this website plots, were taken approximately three weeks prior to high! Not as effective on many winter annual weeds ( especially common chickweed is typically not as on... Is now labeled for use in both seedling and established alfalfa Pursuit without hurting alfalfa only! Competing for water, sunlight, and other weeds the herbicide on warmer days and when weeds are growing! Princep or winter applications of Furloe herbicide for 1991 and 66 % for 1992 ( especially common chickweed typically... Allow for slightly later applications ( up to 6 inches in height in dormant that., Velpar, and nutrients control in alfalfa this fall 2007, Purdue University Purdue University Purdue University University. Than 5 days after harvest and before 2 '' of regrowth program should start when seeding the alfalfa in thin. Were made to dormant alfalfa especially for the Extension Community Princep has since lost its alfalfa and! Mouse-Ear — is a common weed in the stand during winter dormancy, 1991! Spraying beyond this stage may cause stand and/or yield reductions spaces when stands decline for... Trefoil, Ladino or Red Clover – seedling or established alfalfa Guidelines: alfalfa ANR... H2O is now labeled for use in cool-season grass forages ( hay or )! Label for weed control in seedling or established alfalfa fall-applied Sencor plots ( 8 28!