Ovicidal activities and developmental effects of the chitin synthesis inhibitors, Noviflumuron and Novaluron, on the pink bollworm Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae)
Journal Title: Scholars Academic Journal of Biosciences - Year 2017, Vol 5, Issue 6
Abstract
The pink bollworm Pectinophora gossypiella is one of the most destructive insects attacking cotton fields world-wide. The present study was conducted to evaluate the survival and developmental effects of the novel chitin synthesis inhibitors (CSIs), Noviflumuron and Novaluron, on this insect pest, after treatment of 1-day old eggs. These CSIs exhibited ovicidal activities on eggs, in a dose-dependent course. Complete (100%) mortality of larvae was recorded at the highest concentration (8.0 and 5.0 ppm, respectively) and various degrees of toxicity were recorded on larvae at other concentrations. Both CSIs failed to exhibit pupicidal or adulticidal effects. Noviflumuronexhibited stronger ovicidal activity than Novaluron (LC50 values: 0.188 and 0.274 ppm, respectively) and vice versa for larvicidal activity (LC50 values: 0.153 and 0.342 ppm of NovaluronandNoviflumuron, respectively). The larval and pupal durations wereslightly or remarkablyprolonged. The pupation rate was slightly reduced by Noviflumuron but conspicuously hindered by Novaluron. Noviflumuron and Novaluron could not affect the metamorphosis or morphogenesis of P. gossypiella.
Authors and Affiliations
Hamadah Kh. , Ghoneim K
Keywords
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