Nectariless and Pubescent Characters in Cotton: Effect on the Cabbage Looper123

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Abstract
Nectaried and nectariless varieties of cotton, Gossypium hirsutum L., of 2 backgrounds were exposed to cabbage loopers, Trichoplusia ni (Hübner), in no-choice greenhouse tests. Significantly fewer eggs were laid by moths restricted to ‘Deltapine 70100N’ than by those restricted to ‘Deltapine 16.’ However, there was no difference between ‘Stoneville 7A’ and ‘Stoneville 731N.’ In free choice oviposition preference tests, fewer eggs were usually laid on smooth leaf or very pubescent varieties, but the effects of the amount of pubescence were confounded by varietal background.

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