Persistence Toxicity and Field Evaluation of Spinetoram 12 SC against Shoot and Fruit Borer, Leucinodes orbonalis Guenee in Brinjal

摘要

Shoot and fruit borer, Leucinodes orbonalis (Guenee) is a persistent pest on brinjal throughout India. Experiments were undertaken to investigate the persistence of spinetoram 12 SC against larve in the laboratory and to evaluate the effectiveness inthe field in two seasons from 2011 to 2012. The results revealed that there was continuous larval reduction up to 14 DAT under laboratory condition in different doses of biological green insecticide spinetoram (36,45 and 54 g a.i/ha). This reinforces theneed to reapply spinetoram 10-14 days after the first application (peak of biological activity) for effective control. In field experiments, spinetoram 12 SC was significantly effective at 45 and 54 g a.i./ha when sprayed thrice at 15 days interval andminimized the incidence and increased fruit yield.