الفهرس 
Introductionيوجد فقط 14 صفحة متاحة للعرض العام
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المستخلص
”Mealybugs and aphids are small, soft-bodied, sap sucking insects that cause severe damage to various field crops, fruits and vegetables. The cotton mealybug, the Egyptian mealybug, and the citrus mealybug, Planococcus citri are highly polyphagous pests of 154, 123, 65 plant species belonging to more than 52, 49, and 36 plant families, respectively. The Seychelles scale is another highly polyphagous species, with ScaleNet listing 126 genera from 57 families as hosts. The cotton aphid damages cotton plants during both vegetative and reproductive stages and many plant species including eggplants and okra. The cowpea aphid is one of the notorious insect pests of the world, particularly ruing the crops particularly grain legumes.The use of the generalist predator, C. carnea has accounted for one third of all successful biocontrol programs in the world. It has been commercially reared to be apply against several insect pests in the field and has recognized as a potential predator against aphids. Predators may switch to more abundant or more preferred alternative prey instead of feeding on the target pests, or the presence of other food sources may result in predator satiation, which also keeps pests from predation. Also, predators may have higher performance on mixed diets than on single-resource diets. Thus, mixed diets may boost predator populations and thereby result in enhanced pest control.Larvae of some lacewing species were found to feed on all stages of citrus mealybugs and earlier studies demonstrated promising control of mealybugs with green lacewing larvae. However, mealybugs may not be the most suitable and preferred prey of lacewing larvae compared to aphid prey. Therefore, this study designed to evaluate effect of different prey types, as a food, on development, survival, longevity, and reproduction of C. carnea under laboratory conditions. In addition, to examine effect of prey’s host plant, i.e. prey quality, on the same biological attributes of C. carnea. Such information would be helpful for optimizing the mass rearing of C. carnea. The results may also help in designing Integrated Pest Management (IPM) programs involving the use of C. carnea as abiocontrol agent of pests on various crops.