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The European corn borer (Ostrinia nubilalis) is one of the most important   insect pests of maize, and has a significant impact on the production of   this crop. In this work, we examined the effects of different insecticides   on the antioxidative defense system of O. nubilalis larvae. The experimental   setup consisted of a completely randomized block design with 4 replicates.   Four experimental groups were formed as follows: control (C), indoxacarb   (250 mL ha-1), chlorantraniliprole (100 mL ha-1) and the   chlorantraniliprole+lambda cyhalothrin (200 mL ha-1) group. Larvae from   maize stems were collected 20 days after insecticide application and the   whole larvae were homogenized. The activities of superoxide dismutase (SOD),   catalase (CAT), glutathione peroxidase (GPx), glutathione reductase (GR) and   glutathione S-transferase (GST), and the total amount of free SH groups were   assessed. Comparison of the experimental groups showed that indoxacarb   significantly affected the activities of GST, GPx and the total amount of   free SH groups, while chlorantraniliprole significantly affected the   activities of SOD, CAT, GST and the total amount of free SH groups, while   chlorantraniliprole+lambda cyhalothrin significantly affected the activities   of CAT, GST and the total amount of free SH groups. The results show that   exposure to insecticides considerably affects the antioxidative defense   components of the European corn borer larvae, especially chlorantraniliprole   (T2).

archives of biological sciences

Effects of different insecticides on the antioxidative defense system of the European Corn Borer (Ostrinia nubilalis Hübner) (Lepidoptera: Crambidae) larvae