Population dynamics and seasonal incidence of Chilo infuscatellus Snellen on Sugarcane

The shoot borer was first noticed in the field from 1st fortnight of March and continued to 2nd fortnight of August. there was steady increase in the population of larvae during two months (April and May) after which it gradually decreased. the relationship between population of insect and weather parameters showed significant positive correlation with maximum temperature i.e., with increase in temperature population of insect also increased. The maximum incidence (9.32%) was recorded in the first fortnight of May and lowest (1.2%) in the second fortnight of August. the relative humidity and rainfall showed negative relationship with borer population.