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Abstract I- INTRODUCTION ruits and vegetables provide essential nutritional elements of the consumer body. Soft fruits are very much attractive for human being, they offer a variety of delicious tastes and many of them like guava, mango, peaches, citrus, papaya … etc. have great visual appeal. Unfortunately, the fruit growing areas favor the activities of many insect pests. Among the insect pests of fruit and vegetables crops, fruit flies are of special importance (Jilani et al., 2006). Fruit flies (Diptera: Tephritidae) rank among the world as the most serious pests of horticultural crops. They cause direct losses in the yield and marketability. There are nearly 4,000 described species of tephritid fruit fly, categorized in almost 500 genera, of which about 70 species are considered economically important (White and Elson-Harris, 1992). The genus Bactrocera and Ceratitis have a world-wide reputation for its destructive impact on agriculture (Lysandrou, 2009). The behavior and symptoms of infestation of the peach fruit fly is very similar to that of the Mediterranean fruit fly (Afia, 2007). However, the information of ecology and biology of fruit flies in Egypt is urgently required in order to understand how to manage these pests. In the Arab countries, fruit flies have become severe regional problems, with many fruit flies of economic importance. The most notable are the Meditrerranean fruit fly, Cetatitis. capitata, olive fruit fly, B. oleae (Gmelin) and peach fruit fly, B. zonata and cucurbit fly, B. cucurbitae which also have a wide distribution but of lower economic importance (Lysandrou, 2009). The peach fruit fly (PFF), Bactrocera zonata (Saunders) (Diptera, Tephritidae) is |