1Department of Plant Protection, Horticultural College and Research Institute, TNAU, Periyakulam625604, Tamil Nadu, India
2AC & RI, TNAU, Madurai625104, Tamil Nadu, India
3Department of Pulses, TNAU, Coimbatore641003, Tamil Nadu, India
Department of Agricultural Entomology, Agricultural College and Research Institute (AC&RI), Tamil Nadu Agricultural University (TNAU), Madurai625104, Tamil Nadu, India
The seasonal incidence of brinjal shoot and fruit borer Leucinodes orbonalis Guen. was studied at the Regional Research Station, Aruppukottai, Tamil Nadu during 2017-18 and 2018-19. The incidence on the shoot startedin the first week of November peaked in mid-December (52.29%) during 2017-18; while in 2018-19, this initiated in the last week of October peaked in the last week of December (58.54%). The incidence on fruit began in the second week of December with peak in the last week of January (58.20%) during 2017-18; in 2018-19, this began in the second week of December and reached its peak in the first week of February (41.08%). The shoot damage observed during initial periods reduced with fruiting, and exhibited a significant negative correlation with maximum and minimum temperature. The fruit damage showed an increasing trend during initial periods which reduced later on, and revealed significant positive correlation with weather factors. Thus, the peak infestation was from November to mid-February.
Leucinodes orbonalis, Seasonal incidence, Solanum melongena, Weather factors, Peak incidence, Initiation, Shoot and fruit damage, Correlation coefficients, Temperature, Fruiting
