Journal of Environmental Biology

Environmental effect on yellow stem borer,

Scirpophaga incertulas (Walker) and rice leaf folder,

Cnaphalocrocis medinalis (Guenee) on rice crop

S. Zainab, B. Ram and R.N. Singh*

Department of Entomology and Agricultural Zoology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi- 221 005, India

*Corresponding Author E-mail: singhrnacarology58@gmail.com

Key words

Abiotic factors,

Environmental effect,

Rice leaf folder,?

Yellow stem borer

Publication Data

Paper received: 02.05.2015

Revised received: 01.03.2016

Re-revised received: 03.06.2016

Accepted: 12.07.2016

Abstract

Aim: To study the impact of environmental factors on yellow stem borer (YSB) and rice leaf folder (RLF) on rice.

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Methodology: An untreated rice plot of 100 m2 was studied to observe the impact of temperature, rainfall and relative humidity on seasonal abundance of yellow stem borer and rice leaf folder.

Results: Dead Heart (DH) incidence and White ear-head (WE) in YSB were negatively correlated with mean-temperature, positively correlated with relative humidity and showed significant positive correlation with rainfall. The percent incidence of RLF was significantly and negatively correlated with mean temperature, and positively correlated with mean relative humidity and total rainfall. ????

Interpretation: It was observed that abiotic factors play a crucial role in growth and survival of insects.

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