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Under the laboratory conditions, toxicological evaluation of two compounds, Radiant SC 12% and Hexaflumuron (IGR) EC 10% against eggs of Pectinophora gossypiella (Saund.) and biological effect of these compounds on larvae, pupae and adult emergence resulted from treated eggs was also studied. The results revealed that LC 50s were 3.15, 0.811and 0.522 ppm., when one, two and prehatching days old eggs, respectively were treated with Radiant, while LC50s were 3.754, 2.863 and 2.004 ppm, respectively for Hexaflumuron. The obtained results show a prolongation in larval and pupal developments resulted from treated eggs by Radiant, estimated by 20.8, 18.5 and 8.2 days, respectively for larvae and 8.9, 8.8 and 7.9 days for pupae. In case of Hexaflumuron, duration were 22.3, 20.6 and 20.4 days, respectively for larvae after egg treated and 10.8,10.0 and 11.3 days, respectively for pupae. In contrast, in adult stage, the results indicated high reduction in total eggs laid, percentage of hatchability and longevity.

egyptian academic journal of biological sciences. a, entomology

Ovicidal Activity and Biological Effects of Radiant and Hexaflumuron Against Eggs of Pink Bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae)