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Abstract
The peach fruit fly (PFF), Bactrocera zonata (Saunders) (Diptera: Tephritidae) is one of the serious tephritid insect pests attacking tropical and subtropical fruits. In Egypt, the pest is widespread over most of the Egyptian governorates causing serious problems to many fruit crops. The present study aimed to focus on some morphological and biological characteristics of different stages of the PFF under laboratory conditions. Different stages of the PFF were described, measured and illustrated. Biological studies included, durations of different immature stages, fecundity, adult longevity, survival rate and sex ratio. All studies were carried out under the laboratory conditions of 25 ± 2oC, 54- 65% R.H. and 14:10 L:D photoperiod. Total developmental period of PFF (from egg deposition to adult emergence) averaged 18.7 days. The female required 13-21days post emergence to start laying eggs. Total number of eggs/female averaged 235.72. Percentage of adult emergence was 58% and sex ratio (females: males) was 1.2: 1.0. Female and male longevity attained 50.6 and 47.3 days for the fed individuals and 2.8 and 3.1 days for unfed ones, respectively.
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