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Weed control in pastures and hay fields One of the challenges of growing high quality forage for livestock is weed control. As we learn to control one weed specie, another tough to control weed comes on the scene. For years dogfennel and blackberry has been a problem, but today we are seeing a relatively new weed called a thistle move into many pastures. In today's article, I want to share information on several newer herbicides on the market and list some previously hard-to-manage weeds that they will control. Pastureguard is a combination product that is good at controlling several woody weed species including blackberry, sweet gum, Sericia lespedeza, dogfennel, gallberry, several species of roses and lantana. It provides fair control of horsenettle and tropical soda apple. It also has some activity on Maypop passionflower. There is no withdrawal period for beef cattle grazing and a 14 day withdrawal period for hayfields. Surmount controls several broadleaf weeds including horsenettle, tropical soda apple, Prickly pear cactus and is excellent in controlling upright blackberry. Surmount should be applied in the fall to control Prickly pear cactus at a rate of 3 to 4 pints per acre. Control is very slow and may take 2 years to kill the cactus. There is no grazing restriction for Surmount. There is a 3 day withdrawal period for slaughter cattle and 7 day withdrawal period for hay. Milestone controls several broadleaf weed species including thistle, horsenettle, tropical soda apple and buttercup, yet is weak on sida species, dogfennel, plaintains, blackberry, wild radish, and other mustards. Milestone has no grazing restrictions or hay restrictions for any type of livestock. ForeFront controls numerous broadleaf weeds including thistles, horsenettle, buttercup, henbit, plantains, and verbena. There are no grazing restrictions for any type of livestock and a 7 day restriction on hay. Cimarron Plus is newer formulation of Cimarron that has an extra herbicide in the mix that provides control of Pensacola bahigrass, amaranth, curly doc, buttercup, wild garlic, blackberry, dewberry, and honeysuckle. There is also a new formulation called Cimarron Max. Cimarron Max controls a longer list of broadleaf weeds. Dr. Tim Murphy, Extension Weed Agronomist, lists 20 different herbicides that are labeled for pasture and hay field weed control. For a complete list of these products and their ratings on specific weed, call the Emanuel County Extension Office at 237-1226. Each of these products also has a list of additional weeds that they control and each has specific application requirements to make the work. Be sure to read and follow all label requirements.
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