Author(s): U. S NAYAK, K. BARAL, A. KHUNTIA AND L. K RATH

Abstract: Activity of brinjal shoot and fruit borer (BSFB), Leucinodes orbonalis Guenee was studied from the pheromone trap catches during summer 2010 and 2011 in Keonjhar district of Odisha. The pest was first appeared during 3rd standard meteorological week (SMW) in both the years of investigation and then registered an upward trend with two distinct peaks during the month of March-April and May. The correlation studies between abiotic factors and pheromone trapped male population of BSFB revealed a significant positive correlation with temperature (maximum, minimum and average) and negative correlation with relative humidity (both morning and afternoon). Rainfall did not influence the trap catch significantly. The extent of variation in trapped adult population male population due to the multiple interactions of abiotic factors was 82.4 % during 2010 and 56.3 % during 2011; among the abiotic factors, temperatures and relative humidity had key role in adult population fluctuation.

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