Abstract
The susceptibility of sugarcane shoot borer, Chilo infuscatellus Snell., to the granulosis virus at four different rearing temperatures viz ., 20, 25, 30 and 35 °C and the infectivity of the virus stored at three different temperatures viz., 0, 4 and 28 °C for three years were studied. The virus caused high and rapid mortality of third instar larvae when the post-treatment temperature ranged from 30-35 °C. There was a decrease in the mortality rate and an increase in the time taken for kill with decrease in the temperature. Bioassay studies indicated that infectivity of the virus was not reduced significantly even when the virus was stored for three years either at 0, 4 or 28 °C.
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