Research Article

Relative Resistance of Cotton Varieties Against Sucking Pests

T.S. Syed, G.H. Abro, R.D. Khuhro and M.H. Dhauroo

Field studies were carried out to investigate the relative resistance of twenty cotton varieties against sucking pests, that is Jassid, Amrasca devastans Dist., Thrips, Thrips tabaci Lind., Whitefly, Bemisia tabaci (Genn.) and mite, Tetranychus spp. The results indicated that the highest A. devastans population of 2.72 insect leaf^–1 was observed on Greg-25V variety, while the lowest population was found on variety Rajhans (2.06 insect leaf^–1), while the highest and the lowest thrip population of 4.28 and 2.21 insects leaf^–1 were observed on Empire WRD and Rode okra respectively. Similarly, the highest and lowest population of B. tabaci were found on Rehmani and Greg-25V as 1.99 and 1.73 insects leaf^–1 respectively. Whereas in case of Tetranychus spp. the highest and lowest population noted as 3.23 and 1.71 on Rajhan and Coker-8316, BW-673, Rode okra, Genetic male sterile, Russian red leaf, Rehmani, TH-1100 and TH-1174, varieties.

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T.S. Syed, G.H. Abro, R.D. Khuhro and M.H. Dhauroo, 2003. Relative Resistance of Cotton Varieties Against Sucking Pests. Pakistan Journal of Biological Sciences, 6: 1232-1233.

DOI: 10.3923/pjbs.2003.1232.1233

URL: https://scialert.net/abstract/?doi=pjbs.2003.1232.1233

Pakistan Journal of Biological Sciences

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Authors

T.S. Syed

G.H. Abro

R.D. Khuhro

M.H. Dhauroo

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Research Article

Relative Resistance of Cotton Varieties Against Sucking Pests

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