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Journal of Pharmacognosy and Phytochemistry

Journal of Pharmacognosy and Phytochemistry

Vol. 7, Special Issue 5 (2018)

Study on population dynamics of early shoot borer in sugarcane ecosystem at Pantnagar

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 &amp; T. Pantnagar, Uttarakhand, India. Early shoot borer or shoot borer, <em>Chilo infuscutellus</em> (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<sup>th</sup> standard meteorological week (SMW) to 26<sup>th </sup>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<sup>st</sup> and 22<sup>nd</sup> 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<sub>max</sub> and T<sub>min</sub>; negative and highly significant with RH<sub>max</sub>, and negative significant with RH<sub>min</sub>; while, it was non-significantly correlated with rainfall, respectively. Whereas, during the season 2015-16 there was positive and highly significant correlation with T<sub>max</sub>; positive and non-significant correlation with T<sub>min</sub>; negative significant with RH<sub>max</sub>; negative and highly significant with RH<sub>min</sub>, and it was negative significantly correlated with rainfall, respectively. Thus the study exhibited that the peak activity of early shoot borer was from 15<sup>th</sup> to 24<sup>th</sup> and 15<sup>th</sup> to 23<sup>rd</sup> SMW during 2014-15 and 2015-16 crop seasons, respectively.

Pages: 20-25  |  1021 Views  172 Downloads

How to cite this article:
Shivashankara, AK Karnatak, ARNS Subbanna and Joni Kumar. Study on population dynamics of early shoot borer in sugarcane ecosystem at Pantnagar. J Pharmacogn Phytochem 2018;7(5S):20-25.