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Herbicides for Pastures

By Melody Dawn ; Updated September 21, 2017

Herbicides are used to kill unwanted plants and weeds in pastures. They are applied during the growing season in order to impede the growth of an otherwise healthy plant. Selective herbicides destroy only the weeds and non-selective will destroy all vegetation. Herbicides are concentrated and are mixed with water to be broadcast across the pasture. There are many different types of herbicides that can be applied to kill the weeds in pastures


Cimarron is an herbicide that is used primarily on established Bermuda grass. The grass should be established for at least 60 days before the herbicide is applied. If it is applied earlier, the grass could die. Cimarron is applied to pastures to control chickweed, dandelion, buttercup, dogfennel, thistle and geraniums. 0.1 to 0.3 ounces is used for an acre. Add 4 to 5 ounces of herbicide per gallon of water along with 1 to 2 ounces of non-ionic surfactant. The surfactant helps to spread the herbicide evenly over the plant surfaces instead of the application beading up.


Milestone is applied to newly established pasture grass. It is used once the grass begins to take root and has grown 3 to 4 inches. Milestone is used to control thistle, buttercups, cocklebur, pigsweed, horsenettle and ironweed. Use 4 to 5 ounces per gallon of water along with 1 to 2 ounces of nonionic surfactant. Milestone can destroy some pasture grass but reseed of the area is possible. Apply 3 ounces per every acre of pasture.


PastureGard herbicide is used on established pasture grass only. Active ingredients are triclopyr and fluroxypyr. This herbicide is best used on brush and woody plants such as blackberry. It is best used in the summer after the plants have dropped their fruit. Mix 4 to 5 ounces of PastureGard per gallon of water along with 1 to 2 ounces of non-ionic surfactant. Spray approximately 7 ounces of mixture per acre.


Weedmaster herbicide contains the active ingredient of dicamba. This herbicide helps to control a wide range of weeds including brambles, horsenettles and other hard to control weeds. Mix 4 to 5 ounces of herbicide per gallon of water with 1 to 2 ounces of nonionic surfactant. Apply 3 to 4 pints per acre of pasture. Weedmaster will destroy all pasture grass including the weeds so reseeding will be necessary. You will need to wait at least one year before you can reseed. This herbicide is best used during the Summer months. Once the grass and weeds have died, allow the pasture to remain dormant. Reseeding should take place the following summer.


About the Author


Based in Atlanta, Melody Dawn has been writing business articles and blogs since 2004. Her work has appeared in the "Gainesville Times," "Player's Press" and "USA Today." She is also skilled in writing product descriptions and marketing materials. Dawn holds a Master of Business from Brenau University.