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Journal of Entomology
  Year: 2012 | Volume: 9 | Issue: 6 | Page No.: 422-428
DOI: 10.3923/je.2012.422.428
 
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Influence of Weather on the Incidence and Severity of Lesser Mulberry Pyralid and Mulberry Looper in Kashmir, India

G.K. Ramegowda, Irfan Illahi, Vishal Mittal, Imtiyaza Akhter, Anil Dhar and M.A. Khan

Abstract:
This study was conducted at Pampore in Kashmir valley, India during 2009-2011 cropping seasons to measure the incidence and severity of lesser mulberry pyralid, Glyphodes pyloalis Walker (Lepidoptera: Pyralidae) (LMP) and mulberry looper, Hemerophila atrilineata Butler (Lepidoptera: Geometridae) (ML). Fortnightly observations were made on incidence and severity from May to October. Influence of weather parameters on the seasonality and severity LMP and ML was quantified. LMP was recorded from July onwards until leaf fall in October during 2009 and 2010. It was recorded early during 2011 by May 2nd fortnight. Incidence and severity levels of ML were relatively lower compared to that of LMP. During 2009 and 2010 mulberry looper prevailed from July onwards till leaf fall in October. In contrast, during 2011 ML appeared a month late from August 2nd fortnight onwards with a steep increase during last two intervals of observation. Correlations were negatively significant at p = 0.01 for LMP incidence with minimum and maximum temperatures and number of rain days during same fortnight (SFN). Severity of LMP with preceding second fortnight’s morning relative humidity was negative and significant at p = 0.01. Correlations for both incidence and severity of ML with minimum temperature of SFN were negatively significant at p = 0.01. Multiple regression modules with weather parameters of SFN had higher probability and R2 values. There is need to continue the studies to establish precise relations with weather and pest incidence and severity.
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How to cite this article:

G.K. Ramegowda, Irfan Illahi, Vishal Mittal, Imtiyaza Akhter, Anil Dhar and M.A. Khan, 2012. Influence of Weather on the Incidence and Severity of Lesser Mulberry Pyralid and Mulberry Looper in Kashmir, India. Journal of Entomology, 9: 422-428.

DOI: 10.3923/je.2012.422.428

URL: https://scialert.net/abstract/?doi=je.2012.422.428

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