Author(s):

Shivashankara, AK Karnatak, ARNS Subbanna and Joni Kumar

Abstract: The studies on diversity of insect fauna and the population dynamics of early shoot borer in sugarcane ecosystem were carried out for two seasons during 2014-15 and 2015-16 at Norman E. Borlaug Crop Research Centre of G.B.P.U.A & T. Pantnagar, Uttarakhand, India. Early shoot borer or shoot borer, Chilo infuscutellus (Pyralidae: Lepidoptera) is spread extensively in all sugarcane growing areas of the country including Uttarakhand. The incidence of the Shoot borer was observed from 14^th standard meteorological week (SMW) to 26^th standard meteorological week, during both the crop seasons of 2014-15 and 2015-16. The population reached its maximum in the month of May; however the peak activity recorded in the 21^st and 22^nd SMW during both the first and second seasons, respectively. The Pearson correlation coefficient obtained between the weather parameters and early shoot borer population during season 2014-15 revealed that, there was positive non-significant correlation with T_max and T_min; negative and highly significant with RH_max, and negative significant with RH_min; while, it was non-significantly correlated with rainfall, respectively. Whereas, during the season 2015-16 there was positive and highly significant correlation with T_max; positive and non-significant correlation with T_min; negative significant with RH_max; negative and highly significant with RH_min, and it was negative significantly correlated with rainfall, respectively. Thus the study exhibited that the peak activity of early shoot borer was from 15^th to 24^th and 15^th to 23^rd SMW during 2014-15 and 2015-16 crop seasons, respectively.

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