Tuesday, December 11, 2007
D0310

Longevity and egg development of adult female boll weevils fed different parts and stages of cotton fruiting bodies

Allan T. Showler, allan.showler@ars.usda.gov, USDA-ARS, Ifnrru, 2413 East Highway 83, Weslaco, TX

The capacities of the rind (developing calyx and petals of squares; outer casing, or husk, of bolls) and the internal reproductive portion (in squares: anthers, stamens, style, and ovary; in bolls: ovaries and developing seeds and lint) of cotton squares of three sizes (match-head, medium, and large) and bolls of three ages (post-bloom, young, and mature) to influence adult female boll weevil longevity and fecundity were evaluated in laboratory bioassays. While feeding on the reproductive portion of squares was expected to support adult boll weevils for considerable periods of time (e.g., medium square reproductive portion: about 185 d), feeding on rinds also resulted in substantial longevity (e.g., medium square rind: about 120 d). Feeding on the reproductive portion of squares resulted in formation of eggs, but a diet comprised of rinds, particularly from large squares, was associated with high fecundity relative to rinds of young and mature bolls. The reproductive portion and rind of post-bloom and young bolls as sources of food resulted in limited gravidity while mature bolls were not associated with any egg formation.


Species 1: Coleoptera Curculionidae Anthonomus grandis grandis (boll weevil)