Susceptibility of four natural enemies, Geocoris punctipes (Say), Cotesia marginiventris (Cresson), Bracon mellitor Say, and Cardiochiles nigriceps Vierick, to several insecticides was determined. In topical toxicity tests, malathion ultra-low-volume (ULV 95%) was applied undiluted at 1.36 and at 1.02 kg (AI)/ha with cottonseed oil in a total volume of 1.17 liter/ha. Fipronil and cyfluthrin were applied at 0.043 and 0.037 kg (AI)/ha, respectively, plus cottonseed oil in a total volume of 1.17 liter/ha. Emulsifiable concentrate (EC) formulations of malathion and fipronil at 1.12 and 0.043 kg (AI)/ha, respectively, also were applied with water in a total volume of 46.8 liter/ha. All of the insecticides were highly toxic to all four insect species when applied topically. In 1996 insecticide residue tests, malathion at 1.02 kg (AI)/ha, fipronil at 0.056 kg (AI)/ha, and cyfluthrin at 0.037 kg (AI)/ha plus cottonseed oil were applied in a total volume of 1.17 liter/ha. Toxicity of residues of these insecticides to C. nigriceps and G. punctipes was determined at 0, 24, and 48 h after treatment (HAT). Exposure to malathion residues at 0 HAT resulted in lowest survival for the two insects. Toxicity of malathion residues decreased sharply at 48 HAT for both insect species. Cyfluthrin was less toxic than malathion at 0 HAT for both insects. Fipronil was less toxic to C. nigriceps than to G. punctipes at 24 HAT. In 1997 insecticide residue tests, undiluted malathion ULV at 1.36 kg (AI)/ha and malathion ULV at 0.85 kg (AI/ha), fipronil at 0.028 kg (AI/ha), and cyfluthrin at 0.022 kg (AI)/ha plus Orchex[registered] 796 were applied in a total volume of 1.17 liter/ha. Residues of undiluted malathion ULV were highly toxic to the insects through 48 HAT except for C. nigriceps, while residues of malathion ULV at the lower rate were highly toxic to only B. mellitor and C. marginiventris at 48 HAT. Residues of fipronil were less toxic to C. nigriceps than to the other natural enemies 0 to 48 HAT. Residues of cyfluthrin were less toxic to all insects than the other two insecticide treatments for each time regime. none