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    Formulation of Highly Active Cobra Postemergent Herbicide

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    Cobra herbicide shows significant postemergent activity on important broadleaf weeds while exhibiting tolerance on soybeans. Cobra herbicide field studies have been made to evaluate the effects of the formulations. The formulation effects are concerned with the delivery of Cobra herbicide to the plant surface and the herbicide's physical nature on the plant surface. The studies were concerned with crop injury as well as weed control. Cobra herbicide can be formulated as an emulsifiable concentrate; therefore, the major interest in Cobra concerns the surfactant and solvent effects. In addition, treatments were made with crop oil and soybean oil adjuvants, a special silicone surfactant, and a potentially “soft” Cobra wettable powder formulation. The results can be explained by simple physical chemical reasoning.


    Cobra herbicide, lactofen, 1-(carboethoxy)ethyl 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoate, formulations, herbicides, soybeans, field studies, postemergent herbicides, pesticides

    Author Information:

    Keim, WA
    Research associate, PPG Industries, Inc., Barberton, OH

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP19397S