Population dynamics of brinjal shoot and fruit borer Leucinodes orbonalis guenée

Abstract

The effect of abiotic factors on population dynamics of brinjal shoot and fruit borer Leucinodes orbonalis during summer was observed on brinjal. The trap catch revealed that the moth population was active throughout the cropping season and it had a peak of 13.42 moths/trap/day during 19th standard week (second week of May) whereas the effect of weather factors on trap catch was found to be non-significant. The shoot damage was observed only during initial periods which reduced with fruiting. The shoot damage showed a significant positive correlation with maximum and minimum temperature; negative one with morning and evening relative humidity; however the damage on fruits showed an increasing trend during initial periods which reduced later on, and revealed only a non-significant correlation with weather factors.