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Psyche
Volume 2012 (2012), Article ID 186214, 6 pages
http://dx.doi.org/10.1155/2012/186214
Research Article

Association of Climatic Factors on Population Dynamics of Leaf Roller, Diaphania pulverulentalis Hampson (Lepidoptera: Pyralidae) in Mulberry Plantations of Sericulture Seed Farm

1P3 Basic Seed Farm, National Silkworm Seed Organization, Central Silk Board, Ring Road, Srirampura, Mysore, Karnataka 570 008, India
2Head Quarter, National Silkworm Seed Organization, Central Silk Board, Bangalore, India

Received 6 October 2011; Revised 27 November 2011; Accepted 30 November 2011

Academic Editor: Matilda Savopoulou-Soultani

Copyright © 2012 V. K. Rahmathulla et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The production of quality mulberry leaf and subsequent production of quality silk is hampered due to the incidence of various insect pests. The present study analyses the population dynamics of Diaphania pulverulentalis (leaf roller), a serious pest of mulberry in a sericulture seed farm. The results indicated that maximum population buildup of the pest was recorded during rainy season. High humidity coinciding with low temperature because of southwest and northeast monsoon was conducive for breeding and multiplication of the pest. Correlation studies revealed that there was a significant negative correlation between increase in temperature and pest infestation. All other weather factors recorded from the study location have a positive correlation with incidence of the pest. The regression model developed also supported the relationship between the pest population buildup and weather factors.