International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles                      Volume : 11, Issue:1, January, 2022

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

Int.J.Curr.Microbiol.App.Sci.2022.11(1): 335-339

Bio Physical Basis of Resistance to Tobacco Caterpillar Spodoptera litura (Fab.) in Castor
M. Saraswathi, N. MuthukumaraniD* and M. Ramanan
Department of Entomology, Faculty of Agriculture, Annamalai University,
Annamalai Nagar 608 002, Tamil Nadu, India
*Corresponding author

Castor, (Ricinus communis L.) is one of the most important commercial, non-edible oilseed crop. Tobacco caterpillar, Spodoptera litura (Noctuidae: Lepidoptera), is a major defoliator of castor. The biophysical factors in castor play a major role in conferring resistance against S.litura. The present study was conducted with an objective, to study the biophysical basis of resistance against S. litura. Feeding preference of S. litura larvae to the leaves of IVHT-39 followed by Salem Local was minimum in the confinement test. Salem Local recorded minimum feeding preference of S.litura larvae in free choice test followed by DCS-107. Biophysical factors (Leaf length, Leaf breadth, Total leaf area, Leaf thickness, Petiole length and Leaf angle to stem) were analysed. In the present study, Leaf length, Leaf breadth and Total leaf area exerted a positive correlation with larval feeding and Leaf thickness, Petiole length and leaf angle to stem had significant negative correlation with larval feeding of S. litura.

Keywords: Castor, S.litura, Larval feeding and Bio physical factors

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How to cite this article:

Saraswathi, J. M., N. Muthukumaran and Ramanan, M. 2022. Bio Physical Basis of Resistance to Tobacco Caterpillar Spodoptera litura (Fab.) in Castor.Int.J.Curr.Microbiol.App.Sci. 11(1): 335-339. doi:
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