DELAYED EFFECT OF CERTAIN INSECTICIDES ON SOME BIOLOGICAL ASPECTS OF THE PINK AND SPINY BOLLWORMS | ||
| Egyptian Journal of Agricultural Research | ||
| Article 3, Volume 85, Issue 3, September 2007, Pages 805-820 PDF (4.54 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejar.2007.226355 | ||
| Authors | ||
| HAMDY E. EL-METWALLY1; SAEYD A. EMARA2; REDA A. M. AMER2 | ||
| 1Depart of Economic Entomol. and Pesticide Faculty of Agriculture, Cairo University, Giza, Egypt | ||
| 2Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza, Egypt | ||
| Abstract | ||
| The present work was planned to evaluate the delayed effect of certain insecticides, cypermethrin, esfenvalerate, fenpropathrin, cyanophos, methomyl, diflubenzuron and Deenate on the eggs (1-3 days old eggs) and larval stages (newly hatched and 10- day old larvae of the pink bollworm, Pectinophora gossypiella (Saund.) and spiny bollworm, Ferias insu/ana (Boisd.). The following biological aspects were studied for the alive larvae after treatment:Larval duration, pupal duration, larval and pupal mortality percentages, pupal weight (mg.) and pupal reduction percentage. Delayed effect of insecticides were recorded as follows: pr-eoviposition, oviposition & post-oviposition periods, adult longevity, egg laying rate (no. of eggs/female), percentages of egg hatchability, control of hatchability, fecundity and sterility. Fenpropathrin: gave the highest effect on larval duration, pupal weight for male & female, adult longevity, post-oviposition period, egg laying rate, percentages of hatchability, fecundity and sterility. While, Deenate gave the highest delayed effect on larval and pupal durations, percentages of larval and pupal mortality, pre-oviposition and oviposition periods, percentages of egg hatchability, control of hatchability and sterility. The other tested insecticides caused intermediate delayed effect on the treated stages of PBW and SBW. | ||
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