Periodical occurrence and effectiveness of selected insecticides in regulating brinjal shoot and fruit borer (Leucinodes orbonalis Guenee)

Abstract

In the present investigation the seasonal occurrence and effectiveness of seven insecticides on Brinjal shoot and fruit borer were evaluated during Kharif 2015 in Central Research Farm, SHUATS, Allahabad. The occurrence of shoot and fruit borer commenced from 34rd standard week (August fourth week) on shoot with an average population of 0.64% infestation. Infestation on fruit starts in 37th standard week (September second week) with an average population of 3.31% infestation. The shoot and fruit borer population increased and gradually reached its peak level of infestation 5.71% at 41st standard week (October second week). The population of shoot and fruit borer decreased with infestation of 2.26 % at 45th standard week (November 1st week) there after declined trend was observed as temperature decreased. The shoot and fruit borer population increased with increasing temperature and positively correlated with maximum temperature. Minimum percent of shoot infestation, percent fruit infestation and B: C ratio were observed in spinosad 45 SC with (7.49%, 10.12% and 1:6.08) respectively.