[Aim] Six insecticides were tested for their toxicity and efficacy on the eggs, larvae, and adults of Tuta absoluta in greenhouse tomato plants.[Method] The dipping and film methods were used to determine the toxicities of the six insecticides to T. absoluta eggs, larvae, and adults. The effects of these highly toxic insecticides on T. absoluta were investigated in a greenhouse on tomato plants.[Result] Among the six insecticides, spinetoram, emamectin benzoate, and avermectin were toxic to T. absoluta eggs, with LC₅₀ values of 1.415, 13.588, and 23.194 mg·L^-1, respectively. The LC₅₀ of abamectin, tetrazolamide, emamectin benzoate, spinetoram, chlorfenoxamide, and dinotefuran in the larvae were 0.026, 0.052, 0.057, 0.072, 0.484, and 2.039 mg·L^-1, respectively. Only emamectin benzoate and tetrazolium were highly toxic to the adults at 24 h. At 72 h, the LC₅₀ of the six insecticides in T. absoluta adults were as follows:emamectin benzoate, 0.390 mg·L^-1; spinetoram, 1.646 mg·L^-1; tetrazolium furamethoxam, 2.630 mg·L^-1; dinotefuran, 5.577 mg·L^-1; avermectin, 22.502 mg·L^-1; and chlormethoxam, 39.636 mg·L^-1. The control efficacies were above 80% when abamectin, tetrazolamide, emamectin benzoate, or spinetoram were applied to T. absoluta on the 4th day after the peak of adult emergence in the greenhouse.[Conclusion] The six insecticides were highly toxic to T. absoluta eggs, larvae, or adults. Among them, abamectin, tetrazolamide, emamectin benzoate, and spinetoram effectively controlled T. absoluta in the greenhouse.