Impact of Insecticides Applied With/Without Bromoxynil Herbicide on Various Cotton Pests in Laboratory Bioassays

Spray chamber tests with BXN cotton, Gossypium hirsutum (L.), plant terminals demonstrated that mixing bromoxynil herbicide with different classes of insecticides had no negative effects on the efficacy of the insecticides for boll weevils, Anthonomus grandis grandis (Boheman), tarnished plant bugs, Lygus lineolaris (Palisot de Beauvois), or tobacco budworms, Heliothis virescens (F.). Efficacy of azinphos-methyl for control of tarnished plant bugs was significantly increased at 48 h when mixed with bromoxynil. A significant decrease in survival of the tobacco budworm occurred at 24 h when cyfluthrin was mixed with bromoxynil. Bromoxynil can be applied for weed control in cotton as early as the seedling stage. The ability to mix a herbicide with an insecticide can save on application costs.