International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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Original Research Articles                      Volume : 9, Issue:11, November, 2020

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.2020.9(11): 413-419

Field Evaluation of Genetic Variability of Cotton Gossypium hirsutum L. Genotypes against Sucking Pests and Bollworms
M. Sivarama Krishna* and Y. Rama Reddy
Regional Agricultural Research Station, Nandyal 518502; Andhra Pradesh, India
*Corresponding author

A total of 27 cotton Gossypium hirsutum genotypes were field evaluated during 2018-19 at Regional Agricultural Research station Nandyal under AICRP-Cotton programme for their reaction towards sucking pests, leaf hopper Amrasca devastans Distant in particular and bollworms. Results revealed that all the test genotypes were moderately tolerant towards sucking pest particularly leaf hoppers and exhibited below economic threshold level populations but among them, genotype CNH-2052 had recorded lowest leafhopper population of 2.87/3 leaves which was statistically at par with majority of the genotypes. With regard to bollworm populations Helicoverpa armigera hub and Earias vietella were low during the season with regard to Pectinophora gossypiella saunders the genotype LC had recorded the lowest green boll damage of 9.70 % on boll basis by pink bollworm. Lowest open boll damage of 8.73, 9.65, 7.66, 9.41% was recorded by genotypes AKH 10-3, CPD 1851, RAH 1075 and RHC 1307 respectively.

Keywords: Genotype, Tolerance, Sucking pests, Emerging pests, Bollworm complex

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How to cite this article:

Sivarama Krishna, M. and Rama Reddy, Y. 2020. Field Evaluation of Genetic Variability of Cotton Gossypium hirsutum L. Genotypes against Sucking Pests and Bollworms.Int.J.Curr.Microbiol.App.Sci. 9(11): 413-419. doi:
Copyright: This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike license.