G. it. Ent., 3 (12): 179-183
April 30, 1986
Toxicity of some pesticides to the gram pod borer,
Heliothis armigera (Hübner)
(Lepidoptera: Noctuidae)
by
OMKAR & S. R. TRIPATHI
Abstract - The toxicity of eighteen pesticides to the sixth instar larvae of the gram pod borer, Heliothis armigera (Hübner) (body weight: 452.45 ± 35.20 mg) was evaluated by topical application. Cypermethrin (LD50 = 0.27 ηg/larva) was the most toxic pesticide, 29.4 times more than folidol (ethyl-parathion) (the least toxic pesticide). Acephate, carbaryl, dichlorvos, dimethoate, endosulfan, ethion, fenthion, fenvalerate, malathion, monocrotophos, methyl-o-demeton, methyl-parathion, phenthoate, phorate, phosphamidon and quinalphos were 4.1, 1.8, 5.0, 13.2, 11.2, 7.4, 7.6, 8.5, 2.7, 15.9, 5.1, 18.9, 2.3, 3.6, 4.0 and 12.2 times more toxic than folidol (ethyl-parathion). Pyrethroids are suggested to be tested in the fields.
