Impact of meteorological factors on seasonal incidence of brinjal shoot and fruit borer, Leucinodes orbonalis Guenee

Abstract

The seasonal incidence of brinjal shoot and fruit borer Leucinodes orbonalis Guen. on brinjal was studied at Regional research station, Aruppukottai, Tamilnadu during Kharif 2017. The shoot and fruit borer incidence on the shoot was initiated in the last week of July and peaked (32.20%) in the second week of October. The incidence of shoot and fruit borer on fruit was initiated in the second week of August and peaked (40.86%) in the third week of October. Among the weather parameters, maximum temperature showed a positive correlation, while relative humidity and rainfall showed a negative correlation with the shoot and fruit borer infestation. The statistically significant values showed that the incidence of borer population was due to the prevailing ecological conditions. The population increased and gradually reached peak level 40.86% larval population and decline in the trend was noticed this may be due to fail in congenial weather parameters.