Morphological Basis of Resistance in Cotton to the WhiteflyBemisia Tabaci |
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| Authors: | N S Butter B K Vir |
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| Institution: | 1. Cotton Research Laboratory, Punjab Agricultural University, 141 004, Ludhiana, Punjab, India
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| Abstract: | The morphological basis of resistance to the whiteflyBemisia tabaci Genn. (Aleyrodidae: Hemiptera) was studied. The plant characters examined were leaf area, thickness of leaf lamina, hair
density, hair length, angle of insertion of leaf hair, and density of gossypol glands. Hair density and leaf thickness were
positively correlated with the population ofB. tabaci, and a positive correlation was obtained between the adult whitefly population and gossypol glands on stem internodes. Cotton
genotype USA-22 (sparsely hairy) was found to be more tolerant toB. tabaci than was genotype USA-13 (velvety hairy). The use of thinner and glabrous leaved cotton varieties is suggested to minimize
the whitefly menace in cotton. |
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| Keywords: | Gossypium spp Whitefly Bemisia tabaci resistance to morphological basis of resistance leaf area thickness of leaf lamina hair density hair length angle of insertion of leaf hair density of gossypol glands cotton genotypes |
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