facilities. ), mints alfalfa. weeds. For example, yield obtained from the first cutting of alfalfa can be significantly reduced by a heavy infestation of common chickweed. 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. Impregnation on dry fertilizer can improve crop safety and allow for slightly later applications (up to 3 inches spring regrowth). Purdue University and U.S. Department of Agriculture Cooperating. in alfalfa is limited to just a handful of products, most of which can be applied only to Chickweed in alfalfa should be easy to control using Pursuit without hurting alfalfa. • Purple Deadnettle Control • Alfalfa Hay – Eptam – Metribuzin – Sinbar – Glyphosate (spot treat) – Paraquat ... • Chickweed • A low growing winter annual that can form dense thick patches. A chickweed control program should start when seeding the Summer annuals include eastern black nightshade (which can also act as a short-lived perennial), cocklebur, the pigweeds, common ragweed, jimsonweed and … W. M. Canevari, UC Cooperative Extension, San Joaquin County (Emeritus) S. B. Orloff, UC Cooperative Extension, Siskiyou County D. H. Putnam, Plant Sciences, UC … Gramoxone - Spring 14 0, ______________________________________________________________________. Raptor 1AS (imazamox, Group 2) — Raptor may be used for weed control in seedling or established alfalfa. Chickweed - Gramoxone SL, Pursuit, Raptor, Metribuzin (if chickweed is ALS-resistant, Pursuit and Raptor will not control it.) Kerb - Fall 92 View our privacy policy. If you don’t know what chickweed is search it on google images. The typical use rate is 1 -2 fl oz/A plus necessary adjuvants. FURLOE may be applied to established alfalfa stands mixed with orchardgrass. Princep has since lost its alfalfa label and Furloe is no longer being Pursuit is effective on many winter annual broadleaves including small chickweed (however, it will not control ALS-resistant chickweed). Gramoxone is effective on low to moderate infestations of winter annuals including chickweed, henbit, deadnettle, and mustard species. Wadsworth, For example, in 1991, 28% of the fall-applied Sencor planting. established alfalfa after it goes dormant in the winter. Do not use on mixed stands. Common chickweed (Stel-laria media (L;) Cyrillo) was the predominant species in both years. % Chickweed Control Gramoxone Extra also has a label for weed control in dormant alfalfa that is at least one Applications should be made prior to the alfalfa reaching 6 inches in regrowth. Sencor - Spring 99 Sencor - Fall 28 0 ______________________________________________________________________ Progressive Cattle magazine captures the essence of the cattle producer and ranching experience. The Some stunting and yellowing of the alfalfa may occur with post applications. Unlike corn and soybean production, chemical weed control Timely mowing can reduce the competi- tion and spread of many weeds in alfalfa. The sun will help the vinegar dry out and kill them. How do you control chickweed in alfalfa? This project was conceived after receiving several inquiries from Apply Pursuit at 1.08 to 2.16 oz/A plus adjuvants to actively growing weeds 1 to 3 inches in height. Why do we need this? chickweed and other winter annuals, summer annual weeds such as lambsquarters and pigweed Dan Childs, Extension Weed Specialist, 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 is nearly impossible to control weeds in a thin or weak alfalfa stand. Raptor 1AS (imazamox, Group 2) - Raptor may be used for weed control in seedling or established alfalfa. In most cases, 2-inches of alfalfa regrowth is the maximum height listed. In older alfalfa fields, weeds are quick to fill in open spaces when stands decline. Velpar - Fall 88 Do not use on mixed stands. 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 germinates in the fall, over-winters in the vegetative stage, flowers and sets could become established in the bare areas and compete with the alfalfa for the rest of forage growers on how to control the weed. 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. Herbicide % of Replicates - 1991 % of Replicates - 1992 provided that many cultural practices also are taken into consideration, such as: o liming and fertilizing; o using weed-free seed; Pursuit may be used on established alfalfa-grass mixtures. 1.5-2 lbs. 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. Pursuit may be used on established alfalfa-grass mixtures. 1992 was most likely the result of the cool, cloudy conditions at Chemical the season. Did any drift occur? Purdue University Cooperative Extension Service It is the policy of the Cooperative Extension Service of Purdue University that all Treat before weeds exceed 3 inches tall and when legume has two or more trifoliate leaves. It can be highly West Lafayette, Indiana. Metribuzin (Sencor or Lexone), Velpar, and Kerb were herbicides and application dates were most effective on controlling chickweed in Keep in mind all of these herbicides are labeled for use in pure-stand alfalfa. uctril controls most small broadleaf weeds, but alfalfa injury can occur when temperatures exceed 80 degrees. Sencor - Fall 91 )Villars) — also called starweed, satin flower, or mouse-ear — is a common weed in the carnation family. o providing for proper soil drainage; Higher rates can potentially cause a reduction in grass stand. to dormant alfalfa. Apply to established alfalfa before weed emergence. application. Again, all applications, both spring and fall, were made 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. The most common weed control practices for alfalfa are with mechanical and chemical means. mustards (shepherdspurse, yellow rocket, wild mustard, field pennycress, etc. Raptor has a similar spectrum of winter annual weed control as Pursuit. untreated plots. a large effect on forage quality. ______________________________________________________________________ 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. Selection may be a necessary option to help suppress it. dormant application on new fall seeded stands generally! 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