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Abstract
Population dynamics of Ferrisia virgata on Acalypha macrophylla was studied throughout one year. Three annual generations occurred on early June, early July and early August; increasing gradually in size, respectively. F. virgata overwinters during January- early June, probably as adult females in the cracks and junctions of trunk and large branches and on the fallen leaves. In the laboratory, females migrate to the soil in winter. The preferable cardinal directions for this pseudococcid are southern east in first generation and southern west in the other two generations. Significantly positive correlation was found between population density and daily minimum and maximum temperatures, but correlation with relative humidity was insignificant.
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