Studies on Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae), as a factitious host for Trichogramma mass rearing

Tag Elsir E. Abdalla

Abstract


This study was conducted at the Entomology Section, Crop Protection Research Centre, Agricultural Research Corporation, during January 2009-February 2010 at laboratory conditions of 28.3 ±2ºC, 20-60% relative humidity, 100-400 lx light brightness and 12/12h L/D photoperiod. The study investigated the morphology, biology and some ecological aspects of Corcyra cephalonica (Stainton) (Lepidoptera: Pyralidae), relevant to its use as a factitious host for Trichogramma mass rearing in the future. The study clarified the morphology, metamorphosis, pre-oviposition, oviposition and post oviposition periods. It also showed the daily oviposition rate, quality and incubation period of the eggs, number of days taken to emergence of the first moth, to full emergence, longevity of the bulk emergence period, percentage of recovery, sex ratio, fecundity, weight of one egg (mg) and number of eggs in one gram. The study also clarified the effect of relative humidity at the levels of 20-30%, >30-40%, >40-45%, >45-50% and >50-60% on fecundity, weight of one egg and number of eggs in one gram.


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