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Weed Control for Peanuts in Gardens

Peanuts are warm-season legumes that are grown for oil, flour, peanut butter and for eating fresh. The plants thrive best in well-drained, loose and warm soil. Weeds are most harmful to the crop during the early six weeks and are best controlled with herbicides.

  1. Identification

    • Herbicides that effectively control weeds in peanuts include pendimethalin and imazethapyr, as recommended by the University of Florida Extension. The chemicals are sold under a variety of different trade names.

    Description

    • Pendimethalin is a selective herbicide used both for preemergence and early postemergence weed control. The herbicide is sold as granules, emulsifiable concentrate or wettable powder. Products containing imazethapyr are classed as general use, selective herbicides that control weeds by retarding cell growth in the plants. The chemical can be used in combination with other herbicides.

    Target Weeds

    • Pendemethalin herbicides help to control a majority of annual grasses and difficult to control weeds like Texas panicum and sandbur. The herbicide is also very effective on pigweeds and Florida pursley. Imazethapyr controls wild radish, pigweed, wild poinsettia, and yellow and purple nutsedge in peanuts.