ABSTRACT
This study was aimed at evaluating cotton lines with morphological mutant characters in regard to the boll weevil Anthonomus grandis Boheman and yield. The experiment was performed under field conditions with IAC-24 (control), IAC-04/227 (red plant) and IAC-04/489 (okra leaf). The boll weevil infestation was evaluated by counting damaged squares (feeding and egging punctures) and the yield through cotton-boll production. IAC-04/227 varied from IAC-24 and IAC-04/489 until 85 days after outgrowth, presenting a lower percentage of punctured squares by boll weevils. This fact indicates that the red color of the plants is an important character for resistance to the boll weevil. There was no significant difference between the cotton lines in terms of yield, but in terms of the weight of 100 seeds the IAC-24 presented a higher average than the IAC-04/227.
KEY WORDS
Gossypium hirsutum
;
Anthonomus grandis
; okra leaf; red plant
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