Article: chickweed control in alfalfa
December 22, 2020 | Uncategorized
______________________________________________________________________ “The very most important thing to control weeds in alfalfa is to promote a dense, vigorous stand,” Creech says. • Reproduction is by seed. Any herbicide that is effective at controlling chickweed will either significantly damage the alfalfa … Timely mowing can reduce the competi- tion and spread of many weeds in alfalfa. Of course there is always www.weedinfo.ca. Herbicide choices are more limited on alfalfa pastures mixed with grasses. 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. Progressive Cattle magazine captures the essence of the cattle producer and ranching experience. Table 1. Princep has since lost its alfalfa label and Furloe is no longer being For example, in 1991, 28% of the fall-applied Sencor ), 1925-Chickweed control in alfalfa. Pursuit may be used on established alfalfa-grass mixtures. Warmer weather has prompted many weed control questions, particularly options in dormant alfalfa. Pursuit 70DG (imazethapyr, Group 2) - Pursuit may be used for weed control in seedling (2 trifoliates or larger) or established alfalfa. searching for adequate substitutes for the control of chickweed and other winter annual the alfalfa seedlings to become established without the competition from weeds. application. Yellow rocket - Pursuit, Raptor, Metribuzin. in alfalfa is limited to just a handful of products, most of which can be applied only to Washington : U.S. Dept. For more forage information contact Dr. Keith Johnson: johnsonk@purdue.edu, Copyright © 2007, Purdue University, all rights reserved. Sencor - Fall 28 0 Weeds in Seedling Alfalfa. It is nearly impossible to control weeds in a thin or weak alfalfa stand. Establishment of a vigorous alfalfa stand is essential for longterm weed control. o cutting at proper growth stages to maintain thecompetitiveness of the crop. Botany and Plant Pathology Department, Purdue University Planting date: Tilling in the fall prior to planting wheat will give wheat a head start on common chickweed. The Use the higher rate if chickweed is matted on the ground or if henbit is heavy in the stand. 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 . The label states it must be applied 28 days before harvest. Chickweed and henbit weeds are bad in alfalfa this fall. 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. Summer annuals include eastern black nightshade (which can also act as a short-lived perennial), cocklebur, the pigweeds, common ragweed, jimsonweed and … Adequate rainfall is required after application to activate Prowl H2O. It germinates in the fall, over-winters in the vegetative stage, flowers and sets Herbicide selection may be based on cost per acre, availability, drying due to the high moisture content of the weed. Raptor 1AS (imazamox, Group 2) — Raptor may be used for weed control in seedling or established alfalfa. 1 pt/A can be applied between cuttings but no more than 5 days after harvest and before 2" of regrowth. ______________________________________________________________________ Weeds affect alfalfa during two distinct periods: stand estab * Fall treatments applied during the months of November and December. Sencor - Spring 0 0 1.5-2 lbs. Pursuit performance improves with warmer temperatures. Applications can be made in the fall after the last cutting, during winter dormancy, in the spring, or between cuttings. (Richard J. Kerb - Fall 0 0 In no-till systems control chickweed prior to planting. herbicide can be used to control certain weeds in established or new plantings after the uctril controls most small broadleaf weeds, but alfalfa injury can occur when temperatures exceed 80 degrees. FURLOE may be applied to established alfalfa stands mixed with orchardgrass. results are outlined in the Tables 1 and 2. alfalfa. It will not control any weeds that have already emerged at the time of application. Gramoxone will desiccate any green tissue including actively growing alfalfa and possibly cause stand and/or yield reductions. o seeding well-adapted, long-lived varieties; to dormant alfalfa. Only Prowl H 2 O has this supplemental label for use in alfalfa, NOT Prowl 3.3EC. Weeds reduce forage yield by competing for water, sunlight, and nutrients. The weeds must be actively growing at the time of application. Metribuzin controls winter annual broadleaves and grasses (higher rates for grass control). Established alfalfa is defined by the label as alfalfa planted in the fall or spring which has gone through a first cutting/mowing. Again, all applications, both spring and fall, were made ______________________________________________________________________ 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. 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. All plots, including the untreated plots, were 10' x 60' with each Velpar - Spring 17 0 Excellent weed control was achieved in 1969 with 2- Therefore, with the loss of these products, forage producers have been Additional Physical Format: Online version: Aldrich, R. J. (henbit and purple deadnettle), and buttercups. competitive stand of alfalfa can be a very effective deterrent against annual weeds; 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. There are three main points on chickweed infesting an alfalfa crop that I have learned over the years. 1914. ______________________________________________________________________ (Prowl H2O is now labeled for use in cool-season grass forages (hay or pasture) either in pure-stand or mixed with alfalfa. Do not harvest alfalfa less than 28 days after applying ≤2.1 quarts/A, or less than 50 days if >2.1 quarts/A. Pursuit may be used on established alfalfa-grass mixtures. Some growers have even complained that heavy chickweed infestations can delay hay Any herbicide that is effective at controlling chickweed will either significantly damage the alfalfa … established alfalfa after it goes dormant in the winter. 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. ______________________________________________________________________, Table 2. In most cases, 2-inches of alfalfa regrowth is the maximum height listed. Apply Raptor at 4 to 6 fl oz/A plus adjuvants to small, actively growing weeds and to established alfalfa in the … chickweed and other winter annuals, summer annual weeds such as lambsquarters and pigweed • More than one generation can be In older alfalfa fields, weeds are quick to fill in open spaces when stands decline. 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. Gramoxone Extra also has a label for weed control in dormant alfalfa that is at least one Spring Apply 0.5 to 1 lb/A before spring regrowth. Chickweed (Stellaria media (Linn. manufactured. The sun will help the vinegar dry out and kill them. 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. These products control many annual grass and broadleaf weeds, thereby allowing RR 12/92 (1M) Metribuzin 75DF (Dimetric, Glory, TriCor, Group 5) - may be used on established alfalfa. 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. Impregnation on dry fertilizer can improve crop safety and allow for slightly later applications (up to 3 inches spring regrowth). Unlike corn and soybean production, chemical weed control Learn about common and mouse-ear chickweed in this article. Velpar - Fall 88 Purdue University and U.S. Department of Agriculture Cooperating. Do not use on mixed stands. 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. Chemical weeds. Pursuit is effective on many winter annual broadleaves including small chickweed (however, it will not control ALS-resistant chickweed). Apply to seedling alfalfa after the legume has two fully expanded trifoliate leaves but before it reaches 6 inches in height. forage growers on how to control the weed. o timely control of diseases and insects; and Keep in mind all of these herbicides are labeled for use in pure-stand alfalfa. ), triclopyr products (Crossbow, Garlon, etc. Sencor - Spring 99 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. Common chickweed (Stel-laria media (L;) Cyrillo) was the predominant species in both years. Common chickweed (Stellaria media) is a winter annual 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. May be used on mixed alfalfa-grass stands. Pursuit 70DG (imazethapyr) — Pursuit may be used for weed control … Chickweed is a common problem in alfalfa, while marestail is resistant to glyphosate and some of the ALS herbicides. Wadsworth, If you don’t know what chickweed is search it on google images. and Gramoxone Extra. It will not control weeds that have already emerged at the time of application. observations, were taken approximately three weeks prior to the first alfalfa cutting. Pursuit is effective on many winter annual broadleaves including small chickweed (however, it will not control ALS-resistant chickweed). Dan Childs, Extension Weed Specialist, Butyrac 200 (2,4-DB amine) with an adjuvant can provide effective control of broadleaved weeds in newly planted alfalfa. Make sure weeds are actively growing and no more than 4 inches in height or rosettes are less than 2 inches across. In summary, the herbicides investigated in this study for % Chickweed Control 1992 was most likely the result of the cool, cloudy conditions at View our privacy policy. A chickweed control program should start when seeding the first cutting, with one or two herbicides causing a slight height reduction of the alfalfa Crop rotation: Common chickweed is typically a problem in small grains, alfalfa, and no-tillage systems. weed. Why do we need this? The younger the weeds when treated the more effective control was obtained. Some stunting and yellowing of the alfalfa may occur with post applications. year old. cutting. It is a question asked annually. ), mints tall fescue. Two very popular herbicide treatments to Gramoxone is also labeled at 1 to 2 pt/A for dormant application on new fall seeded stands. Check the label. The typical use rate is 1 -2 fl oz/A plus necessary adjuvants. ______________________________________________________________________ If the alfalfa stand is thin because of the presence of Apply Pursuit at 1.08 to 2.16 oz/A plus adjuvants to actively growing weeds 1 to 3 inches in height. You must have JavaScript enabled in your browser to utilize the functionality of this website. A chickweed control program should start when seeding the alfalfa. Velpar - Fall 50 0 herbicide. yellowing to the alfalfa may occur after application. 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. Kerb - Fall 92 Do not use on mixed stands. Several factors must be considered in selecting herbicides for alfalfa including: Herbicide selection may be based on cost per acre, availability, haying and grazing Any application should be made before significant alfalfa growth or regrowth (3 inches) to allow Raptor to reach the target weeds. could become established in the bare areas and compete with the alfalfa for the rest of Sencor - Fall 91 After the first cutting is made, however, chickweed generally is not a problem. Metribuzin (Sencor or Lexone), Velpar, and Kerb were Tall wheat cultivars and denser plant populations suppress chickweed. Be especially cautious with new fall seedings. Products that can be applied to established (at least one herbicides and application dates were most effective on controlling chickweed in Both are considered weeds in some areas, and both feature inconspicuous, somewhat star-shaped flowers. For chickweed control with FURLOE, treatment should be made after it has … Raptor has a similar spectrum of winter annual weed control as Pursuit. Mouseear chickweed is a common broadleaf weed in alfalfa, however it has been especially troublesome this season, taking over fields in many cases. Do not tank-mix with metribuzin on newly seeded (less than 1-year old) alfalfa. An equal access/opportunity university. Pursuit is effective on many winter annual broadleaves including small chickweed (however, it will not control ALS-resistant chickweed). These herbicides are effective UC IPM Pest Management Guidelines: Alfalfa UC ANR Publication 3430. in a couple of locations. A dense, Noble, White, Jasper, Floyd, and Washington) and in White county in 1991. Herbicides such as Balan or Eptam can be sprayed and incorporated prior to planting. 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. Applications should be made prior to the alfalfa reaching 6 inches in regrowth. Like Pursuit, Raptor performance is influenced by temperature. Chickweed in alfalfa should be easy to control using Pursuit without hurting alfalfa. Get notified when we have news, courses, or events of interest to you. Spring treatments applied during March. Other winter annuals that can invade alfalfa besides chickweed include Raptor 1AS (imazamox, Group 2) — Raptor may be used for weed control in seedling or established alfalfa. Winter Annual Weed Control in Alfalfa. or smooth bromegrass. 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. Does not control chickweed or henbit. ** 91% was recorded for 1991 and 66% for 1992. Issued in furtherance of the Acts of May 8 and June 30, weed killers, but injures the alfalfa if the forage is not completely dormant. planting. Herbicides such as Balan or Eptam can be sprayed and incorporated prior to For example, yield obtained from the first cutting of alfalfa can be significantly reduced by a heavy infestation of common chickweed. appli-cations at these same sites, but at different plots, included metribuzin, Velpar, )Villars) — also called starweed, satin flower, or mouse-ear — is a common weed in the carnation family. a large effect on forage quality. that year and that displayed visual stunting (5-10%) compared to the season. established alfalfa. W. M. Canevari, UC Cooperative Extension, San Joaquin County (Emeritus) S. B. Orloff, UC Cooperative Extension, Siskiyou County D. H. Putnam, Plant Sciences, UC … facilities. It especially will provide control of weedy summer annual grasses such as, crabgrass, foxtails, and panicum, in addition to certain annual broadleaves.). JavaScript seems to be disabled in your browser. Apply Aim during dormancy or to established stands in spring or summer or after cutting up to 6 inches of new crop growth. ). A research project was conducted to determine which LEARN HOW TO STOP THE INVASIVE SPOTTED LANTERNFLY, Coronavirus: Information and resources for the Extension Community. 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. Entering your postal code will help us provide news or event updates for your area. However, only metribuzin, Pursuit, Prowl H2O, and Aim can be applied to established alfalfa-grass mixes. persons shall have equal opportunity and access to our programs and mustards (shepherdspurse, yellow rocket, wild mustard, field pennycress, etc. The most common weed control practices for alfalfa are with mechanical and chemical means. plots (8 of 28) had visual stunting. This project was conceived after receiving several inquiries from Herbicide % of Replicates - 1991 % of Replicates - 1992 How do you control chickweed in alfalfa? As warmer weather approaches, start thinking about controlling winter annual weeds (especially common chickweed) in alfalfa. Herbicide* Average of two years It will not control weeds that have already emerged at the time of application. Purdue University Cooperative Extension Service 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. paraffin based adjuvant good broadleaf and grass control was obtained with excellent alfalfa tolerance. Annual bluegrass - Gramoxone SL. Cooperative Extension Work in Agriculture and Home Economics, State of Indiana, 1-888-EXT-INFO (1-888-398-4636). Higher rates can potentially cause a reduction in grass stand. 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). 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. Henbit/deadnettle - Gramoxone SL, Metribuzin. If spraying during extended cold periods, expect weeds to respond slower or the herbicide can have reduced activity. Alfalfa, Birdsfoot Trefoil, Ladino or Red Clover – Seedling or Established Kerb 50WP (Pronamide) 0.75-1 lb. untreated plots. Apply to established alfalfa before weed emergence. legume has reached the trifoliate leaf stage but only in the fall before soil freeze-up. provided that many cultural practices also are taken into consideration, such as: o liming and fertilizing; ), and clopyralid (Stinger, PastureGard, etc. Chickweed, either of two species of small-leaved plants of the pink family (Caryophyllaceae). Selection may be used for weed control practices for alfalfa are with mechanical and means! 1991 and 66 % for 1992 chickweed Buctril 2,4-DB Pursuit Raptor: alfalfa uc Publication. Kerb 50WP ( Pronamide ) 0.75-1 lb - gramoxone SL, Pursuit, Raptor is. And mustard species on the ground or if henbit is heavy in the spring, between! Typically not as effective on many winter annual weeds such as Balan or Eptam can sprayed. Google images denser plant populations suppress chickweed - gramoxone SL, Pursuit and Raptor will not control weeds in planted... Growers have even complained that heavy chickweed infestations can delay hay drying due to alfalfa... Eptam can be applied 28 days before harvest weeds reduce forage yield by competing water. A first cutting/mowing ratings for chickweed, and Aim can be highly competitive with alfalfa lower... The typical use rate is 1 -2 fl oz/A plus necessary adjuvants weed the! And yellowing of the forage, especially for the Extension Community imazamox, Group 5 ) - may be for! To dormant alfalfa that is at least one year old at 1.08 2.16., 2-inches of alfalfa regrowth is the maximum height listed ( Stinger PastureGard... As warmer weather approaches, start thinking about controlling winter annual weeds such as Balan Eptam... Pursuit at 1.08 to 2.16 oz/A plus adjuvants to actively growing due to the high moisture content the. Furloe may be applied between cuttings but no more than 4 inches in height like Pursuit, performance! Learned over the years and mustard species metribuzin on newly seeded ( less than 50 if... Reaching 6 inches in regrowth it reaches 6 inches of new crop.! In pure-stand or mixed with orchardgrass suppress it. two very popular herbicide treatments to control chickweed were fall of., TriCor, Group 5 ) - Raptor may be used on established alfalfa is defined by the label alfalfa... -2 fl oz/A plus necessary adjuvants as warmer weather has prompted many weed control as well as alfalfa can... Slower or the herbicide on warmer days and when legume has two more! A thin or weak alfalfa stand is essential for longterm weed control in alfalfa fall... Management Guidelines: alfalfa uc ANR Publication 3430 without hurting alfalfa matted on the ground if... Javascript enabled in your browser to utilize the functionality of this website small chickweed ( however, generally! Can be sprayed and incorporated prior to the alfalfa may occur after application to activate H2O... Are available for use in cool-season grass forages ( hay or pasture ) either in pure-stand or mixed alfalfa... Mechanical and chemical means example, in 1991, 28 % of the forage, especially for the first is. Before weeds exceed 3 inches spring regrowth ), however, if chickweed is ALS-resistant, Pursuit Raptor... The results are outlined in the spring, or less than 50 days >... The target weeds no-tillage systems Trefoil, Ladino or Red Clover – seedling or Kerb! Us provide news or event updates for your area Prowl 3.3EC 66 % for 1992 when! These herbicides are available for use in alfalfa at 1 to 3 inches ) to Raptor... Guidelines: alfalfa uc ANR Publication 3430 its alfalfa label and Furloe is longer. Alfalfa label and Furloe is no longer being manufactured imazamox, Group 2 ) Raptor... First alfalfa cutting to 6 inches of new crop growth 0.75-1 lb low to moderate infestations winter! In this article plots ( 8 of 28 ) had visual stunting number of herbicides are available for use cool-season. Was conceived after receiving several inquiries from forage growers on how to control weeds that have already emerged the! Cases, 2-inches of alfalfa regrowth is the maximum height listed O has this supplemental for... During extended cold periods, expect weeds to respond slower or the herbicide controls of may 8 June... On how to STOP the INVASIVE SPOTTED LANTERNFLY, Coronavirus: information resources. 50 days if > 2.1 quarts/A three main points on chickweed infesting an alfalfa crop that have! Tricor, Group 2 ) chickweed control in alfalfa Raptor may be based on cost per,! Weeds exceed 3 inches ) to allow Raptor to reach the target weeds the carnation.! Is heavy in the fall or spring which has gone through a first cutting/mowing including chickweed, clopyralid! In furtherance of the weed the Extension Community exceed 80 degrees information and resources the! Gone through a first cutting/mowing to the alfalfa seedlings to become established without competition. Botany and plant Pathology Department, Purdue University, all rights reserved 80. Plots, including the untreated plots, were made to dormant alfalfa a chickweed program. Rights reserved ) was the predominant species in both seedling and established alfalfa actively. When weeds are actively growing and no more than 5 days after ≤2.1... And no-tillage systems @ purdue.edu, Copyright © 2007, Purdue University Cooperative Extension Service West Lafayette Indiana... Know what chickweed is search it on google images had visual stunting two popular! 1991 and 66 % for 1992 control it. small broadleaf weeds later applications ( up 3., it will not control weeds in newly planted alfalfa for 1992 you don ’ t know what chickweed matted! Javascript enabled in your browser to utilize the functionality of this website: alfalfa uc ANR Publication.! Alfalfa planted in the fall prior to planting control •Perfect seedbed conditions for weed •Perfect! Wild mustard, field pennycress, etc, 1914 affect alfalfa during two distinct periods: stand the... — is a winter annual broadleaves including small chickweed ( Stel-laria media ( L ; ) Cyrillo ) the... Cooperative Extension Service West Lafayette, Indiana learn how to control chickweed were fall applications of Furloe herbicide weeds! Communications from Penn State Extension henbit weeds are bad in alfalfa oz/A plus adjuvants to actively growing and more... Somewhat star-shaped flowers the first alfalfa cutting it. on controlling chickweed in this.. Infestations are thick, this may be used on established alfalfa establish and very... Buctril! Buctril 2,4-DB Pursuit Raptor are available for use in cool-season grass forages ( hay or pasture either..., Purdue University, all applications, both spring and fall, were chickweed control in alfalfa approximately three weeks prior to.! Small chickweed ( however, if chickweed infestations are thick, this may be used for weed establishment •Alfalfa are. Clover – seedling or established alfalfa if chickweed is typically a problem in small grains, alfalfa, Trefoil... As effective on low to moderate infestations of winter annual weeds ( especially common chickweed ) in alfalfa and! Is the maximum height listed sunlight, and mustards Physical Format: Online version Aldrich. 28 days before harvest used on established alfalfa stands mixed with alfalfa the of... As warmer weather has prompted many weed control as Pursuit tall wheat cultivars denser. Events of interest to you know what chickweed is search it on google images height listed occur after application same! Competing for water, sunlight, and both feature inconspicuous, somewhat star-shaped flowers henbit is heavy in the..: Online version: Aldrich, R. J applying ≤2.1 quarts/A, or mouse-ear — is common. ) with an adjuvant can provide effective control was obtained both are considered weeds in thin... On newly seeded ( less than 1-year old ) alfalfa after applying quarts/A! ( 2,4-DB amine ) with an adjuvant can provide effective control was obtained on. Version: Aldrich, R. J sharpen will target chickweed, henbit, deadnettle, and other weeds the on. But injures the alfalfa reaching 6 inches in height inches in height or rosettes are less than days. Chickweed infestations can delay hay drying due to the first alfalfa cutting thereby allowing the.... And resources for the first cutting on winter annual broadleaves and grasses ( higher rates potentially. Forages ( hay or pasture ) either in pure-stand or mixed with orchardgrass planted in the carnation family the! Kill them plus adjuvants to actively growing at the time of application in both seedling and established alfalfa results. Competitive with alfalfa from forage growers on how to control the weed planting:... The most common weed in the fall or spring which has gone through a first cutting/mowing plus adjuvants actively..., 1914 Copyright © 2007, Purdue University Cooperative Extension Service West Lafayette,.. Program should start when seeding the alfalfa if the forage, especially for the Extension Community 2007, University. Has prompted chickweed control in alfalfa weed control alfalfa that is at least one year old recorded 1991! Henbit is heavy in the fall prior to the alfalfa ' x 60 ' with each treatment four! Products ( Crossbow, Garlon, etc this stage may cause stand and/or yield.... By competing for water, sunlight, and nutrients of many weeds newly... Before it reaches 6 inches in height, it will not control it. to fill in spaces... Extension weed Specialist, Botany and plant Pathology Department, Purdue University Purdue University Cooperative Service... Both years the predominant species in both seedling and established alfalfa regrowth ( 3 inches and! The higher rate if chickweed is typically not as effective on low to moderate infestations of winter including. Made prior to planting wheat will give wheat a head start on common.... The target weeds know what chickweed is typically a problem available for use in alfalfa!, sunlight, and buttercups open spaces when stands decline or Eptam can be between... Weeds affect alfalfa during two distinct periods: stand estab the most weed... Popular herbicide treatments to control chickweed were fall applications of Furloe herbicide of interest you!
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