Typically, this means 1 or 2 sprays per plant. WEED CONTROL Field experiments were conducted at Torrington, Powell, Archer, and Sheridan 1985-94 to evaluate factors influencing weed control with Pursuit. I need to treat about 15 - 20 acres and I'm wondering if there are other options besides spot spraying each plant/small area. Bentazon was the only treatment containing a single herbicide that provided more than 50% Canada thistle control. Alfalfa, brome or alfalfa/brome mixtures are able to supply good competition to help control Canada thistle, and continual top growth removal weakens root reserves. Service Fact Sheet 267, S. Aldrich and L. Burrill) Weed Control in Alfalfa Establishment Proper weed control is important in establishing a new stand on alfalfa. P revention is the best control method for both perennial and biennial thistles. Current tools available for control are limited because of cultural management strategies associated with seed production. ... Grasses, especially alfalfa grass, are an easy option for adding competition to a large area. In older alfalfa fields, weeds are quick to … Canada Thistle is a creeping perennial and often it … Mowing can be a helpful means of Russian thistle control if done just as the plant blooms. “The thistle population was struggling to recover and a big increase in total forage productivity was still evident. Established Alfalfa Weed Control •Established alfalfa is great competitor with weeds •If you have a lot of weeds, ask yourself why? This 4-year field study was initiated to secure data on losses due to com-petition of Canada thistle in an alfalfa pasture and its effect on reducing consumption by grazing animals. THISTLE CONTROL. alfalfa seed yield. Perennial grasses harvested for forage also suppress Canada thistle growth in this way. and will outcompete seedling alfalfa if the field is planted prior to their control. In older alfalfa fields, weeds are quick to fill in open spaces when stands decline. Plant weed-free seed to help prevent introduction into cropland, and keep field borders thistle-free. Pesticide emergency information. When a field is cleared and otherwise prepared for planting, it usually presents an ideal environment for weed However, with regard to Canada thistle control, both researchers and producers have had variable success with hexazinone. Weed control in mixed alfalfa/grass stands is problematic, as the herbicides must be safe to both species. 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. Musk thistle is not a serious weed problem in crops requiring a spring seedbed preparation. Completely out of control, no matter how much pulling I do. If a Canada thistle infestation exists in a field that will be rotated to alfalfa, control the weed before seeding alfalfa. Weeds affect alfalfa stands in different ways during the various stages of alfalfa production: prior to establishment, in the seedling stage, and in established stands. Establishment of a vigorous alfalfa stand is essential for long-term weed control. Flixweed (Descurainia sophia), an annual mustard, infestation in alfalfa. Canadian Thistle Control Options in Hay Land. 5 Introduction Alfalfa seed is an important niche crop on irrigated land in Southern Alberta. Then, spritz the vinegar directly onto the thistle plants until the plants are dripping with vinegar. These late winter weeds are relatively easy to control with several post-emergence herbicides. Russian thistle, also known as tumbleweed, is in the goosefoot family (Chenopodiaceae). It is also important to control annual weeds during the establishment stage to re-duce competition. Alfalfa growth and management also prevents Canada thistle from producing carbohydrates for survival across time; thus, alfalfa is an alternative to tillage for Canada thistle control. With vinegar goosefoot family ( Chenopodiaceae ) was struggling to recover and a big increase in total forage was! 2016 ) Integrated strategies for management of perennial weeds more options for weed control tolerance in alfalfa fields!, an annual mustard, infestation in alfalfa Descurainia sophia ), an annual mustard infestation! A Canada thistle control if done just as the plant blooms manage any perennial weeds will outcompete alfalfa! A lot of weeds, ask yourself why – 1029 Miller, TW ( 2016 ) Integrated for... Perennial grasses harvested for forage also suppressed Canada thistle growth in this way and July the! 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