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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
Index Copernicus ICI Journals Master List 2018 - IJCMAS--ICV 2018: 95.39 For more details click here
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2018: 95.39
For more details click here

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Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2018.7(9): 200-212
DOI: https://doi.org/10.20546/ijcmas.2018.709.026


Impact of Environmental Resistance Factors on Abundance of Spotted Bollworm, Earias vittella Fabricius and Helicoverpa armigera Hubner on Bt and Non-Bt Cotton in Odisha
Uttam Kumar Behera1*, Chitta Ranjan Satapathy2 and Bishnu Charan Jena2
1Department of Entomology, College of Agriculture, Bhawanipatna, Orissa University of Agriculture and Technology, Kalahandi, Odisha, India
2College of Agriculture, Bhubaneswar, Orissa University of Agriculture and Technology, Bhubaneswar, Odisha, India
*Corresponding author
Abstract:

The field study aimed to assess impact of environmental resistance factors on population dynamics of Earias vittella Fabricius and Helicoverpa armigera Hubner on Bt and non-Bt cotton was conducted at the Regional Research and Technology Transfer Station, Bhawanipatna, Kalahandi. The results revealed that the transgenic Bunny Bt cotton incorporated with Cry 1Ac and Cry 2Ab remained absolutely free from bollworms infestation throughout the crop season in 2013 and 2014. However, in non-Bt of same Bunny hybrid, the peak incidence of E. vittella with damage of terminal shoots (5.96%), squares (12.97%) and bolls (9.55%) were noticed at 35th, 45th and 38th SMW. Similarly, the peak occurrence of H. armigera damage to squares (6.07 %) and bolls (11.08 %) was recorded at 41st and 40th SMW in both the years. Maximum larval population E. vittella and H. armigera were noticed during 38th to 41st SMW in both the years. The correlation coefficient of larval population of both the bollworms and oviposition by H. armigera with the weather parameters remained non-significant.


Keywords: Seasonal incidence, Earias vittella, Helicoverpa armigera, Environmental resistance factor, Bt and non-Bt cotton
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How to cite this article:

Uttam Kumar Behera, Chitta Ranjan Satapathy and Bishnu Charan Jena. 2018. Impact of Environmental Resistance Factors on Abundance of Spotted Bollworm, Earias vittella Fabricius and Helicoverpa armigera Hubner on Bt and Non-Bt Cotton in Odisha.Int.J.Curr.Microbiol.App.Sci. 7(9): 200-212. doi: https://doi.org/10.20546/ijcmas.2018.709.026