Leaf hairiness and leafhopper resistance in selected cotton (Gossypium hirsutum L.) lines.
1989
Sana E.A. | Cabangbang R.P. | Bader R.F. | Manguiat P.H.
Twenty-two advanced line selections derived from crosses of leafhopper resistant and high yielding parents of cotton were evaluated to determine the degree of hairiness and its association with leafhopper damage. Furthermore, the relationship of leaf hairiness with earliness, yield and yield components were also evaluated. The materials used in the study exhibited high degree of variation in leaf hair density and hair length in both the proximal and distal portion of the leaves. The results also showed that while more hairs were produced at the distal portion of the leaves, the hairs were considerably much longer in the basal part. Leaf hairiness, particularly distal leaf hair density was highly associated with leafhopper damage. The results highlighted the significant role of distal leaf hair density in the control of leafhopper infestation. Hair density did not have any significant correlation with earliness, yield, and yield components in cotton.
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