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 in the 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 the need 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 and minimized the incidence and increased fruit yield.
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Agricultural Students Union
Tamil Nadu Agricultural University
Coimbatore - 641 003
Tamil Nadu, India.
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