Seasonal occurrence of white fly Acaudaleyrodesalhagii p. (Homoptera: Aleyrodidae) on Zizyphusspin-christi (L.) wild

Abstract

A study was conducted in the collage of Agriculture – Baghdad in 2010.Theresults indicated that the nymphs of Acaudaleyrodesalhagii p. appeared on Zizyphus during the first week of April until the end of November on Zizyphusspin-christi (L.) wild . High density of insect population was observed during April,May, June and October. The highest population density of the white fly occurred on the middle level of the tree while the lowest population density was in the upper level ofthe tree. Five overlapping generations per year were recorded. The highest infestation percentageswere 39% and 54% during May and November respectively .The predators chrysopa sp. Andorius sp. Were recorded. The white fly Acaudaleyrodesalhagii p. in infested also leaves of pomegranate and some ornament plants and the population density concentrate on upper surface of Zizyphus leaves and spends hibernation during winter.