Under field conditions, the green bug Coccus viridis (Green) population was positi- vely correlated and the infection by the fungus, Cephaloporium lecanil Zimm., negatively so with mean maximum most and minimum-most temperatures recorded at 8 am, and p.m. While maximum-most relat ve humidity (afternoon) showed nagative correlation with the pest population, forenoon and afternoon mean humidity and maximum most humidity (after- noon) showed positive correlation with the fungus infection. Total rainfall one and two weeks prior to the observation was negatively correlated with the pest population and positively with the fungus infection. The multiple correlation showed the greater influence of temperature than humidity on the pest population as well as on the tungus infection, There existed a negative correlation between the pest population and the natural infection of the fungus.
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Tamil Nadu Agricultural University
Coimbatore - 641 003
Tamil Nadu, India.
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