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Population dynamics of the red scale insect Aonidiella aurantii Mask, the whitefly Bemisia tabaci (Gennandius) and the leaf hopper Empoasca lybica De-Berg on Zizyphus trees in upper Egypt (Homoptera: Diaspididae, Aleyrodidae, Cicadellidae)



Population dynamics of the red scale insect Aonidiella aurantii Mask, the whitefly Bemisia tabaci (Gennandius) and the leaf hopper Empoasca lybica De-Berg on Zizyphus trees in upper Egypt (Homoptera: Diaspididae, Aleyrodidae, Cicadellidae)



Assiut Journal of Agricultural Sciences 18(1): 267-178



The activity and abundance of Aonidiella aurantii, Bemisia tabaci and Empoasca lybica on Ziziphus trees was studied in Egypt from February 1983 to February 1984. It was estimated that the 3 insects had 5, 9 and 11 overlapping annual generations, respectively. Numbers of individuals of A. aurantii were lowest in the 2nd generation, while those of B. tabaci were greatest in the 1st generation and lowest in the 8th.

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