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Pollen Feeding by Overwintering Boll Weevils

G.D. Jones, J.R. Coppedge


Pollen analyses were used to determine alternative foraging resources of boll weevils, Anthonomus grandis Boheman (Coleoptera: Curculionidae), in Uvalde Texas from April - July, 1995. There were 156 different pollen types encountered within the samples: 131 types were identified to the family, genus, or species ranks, and 25 remained unknown. Pollen representing 44 families, 86 genera, and 14 species occurred in the samples. Boll weevils captured in April contained the greatest number of pollen grains and pollen types. Those captured in June had the fewest. Boll weevils foraged on the greatest number of alternative foraging resources in April, and the fewest in June. Pollen types from the Asteraceae, Fabaceae, Poaceae, and Rhamnaceae occurred in each month. The Fabaceae represented more pollen types (33) than any other family, followed by the Asteraceae (22). The Malvaceae did not occur until June, and was found in both June and July. Our research showed that boll weevils in Uvalde, Texas have a wide range of alternative foraging resources.

Reprinted from Proceedings of the 1996 Beltwide Cotton Conferences pp. 976 - 977
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998