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Biological studies on certian predators associated with some mealybugs
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The objective of this study was aimed to study the influence of five constant temperature degrees (16, 20, 24, 28 and 32şC) on the biological characteristics and life table parameters as well as the developmental threshold and assessment of the thermal days requirements for development (DD's) for predators, Rodolia cardinalis, Nephus includens and Crysoperla carnea. In addition, the current investigations were designed to provide information for survivalship, the duration of the developmental stages and the ovipositional periods as well as the adult longevity for males and females, fecundity and fecundity rate to serve as a basis for the use of these predators in biological control program.
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