Thidiazuron: Effect of Applications on Boll Weevil and Bollworm Population Densities, Leaf Abscission, and Regrowth of the Cotton Plant

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In a replicated field test with cotton, a preconditioning application of thidiazuron at 0.11 kg Al/ha followed by a full defoliating application (0.22 kg AI/ha) applied 7 days later removed significantly more leaves and squares and reduced regrowth significantly more than an application of a standard defoliant, S,S,S-tributyl phosphorotrithioate (as DEF®), applied at 1.56 kg Al/ha. Thidiazuron treatments also reduced population densities of boll weevils, Anthonomus grandis grandis Boheman, and bollworms, Heliothis zea (Boddie), but did not adversely affect yield, seed germination, or fiber properties.

Document Type: Research Article

Publication date: December 15, 1980

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