Screening of some insecticides against the cotton bollworms, Pectinophora gossypiella (Saund.) and Earias insulana (Boisd.) | ||
| Journal of Pest Control and Environmental Sciences | ||
| Volume 15, Issue 2, December 2007, Pages 63-74 PDF (219.05 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpces.2007.459659 | ||
| Authors | ||
| Ahmed F. El-Aswad* ; Maher I. Aly | ||
| Pesticide Chemistry Dept., Faculty of Agriculture, Alexandria University | ||
| Abstract | ||
| The experiment was conducted to evaluate the efficacy of certain EC formulations from organophosphorus and pyrethroid insecticides against the field population of cotton bollworms; Pectinophora gossypiella (Saund.) and Earias insulana (Boisd.). This experiment was done during cotton season of 2006 according to the protocol of the Egyptian Ministry of Agriculture. The results showed significant differences between the infestation numbers of all tested insecticides and untreated check. The percent infestation, varied between 2 and 33% comparable to 20 and 47% in the control. The results indicated that the tested pyrethroids were more effective in reducing cotton bollworm infestation than that of the tested organophosphorus insecticides. Moreover, the four EC formulations of chlorpyrifos (Chlorozan®, Chloroban®, Renoban® and Pyriphos Nasr®) and the three EC formulations of lambada-cyhalothrin (Agristar®, Axon® and Lamdazd®) gave different percent reduction in bollworms number. In addition, the descending order of the tested insecticides according to their efficacy is as follows: Esfenvalerate = lambada-cyhalothrin = deltamethrin = γ-cyhalothrin > chlorpyrifos > profenofos. Therefore, pyrethroid insecticides can be applied as a part of a management program to control pink bollworm, Pectinophora gossypiella and spiny bollworm, Earias insulana. | ||
| Keywords | ||
| Insecticides; organophosphorus; pyrethroids; bollworms | ||
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