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Spread of the Boll Weevil1 by Drainage Water and Air Currents2

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Abstract:

When conditions are ideal, the thurberia weevil, Anthonomus grandis thurberiae Pierce, may be moved in thurberia bolls in flood drainage water from the mountainous areas where thurberia grows into the valleys where cotton is cultivated. However, the necessary conditions seldom occur. Tests in the laboratory indicated that vertical air velocities of 2.5-5.5 meters per second are necessary to suspend passive boll weevils, A. grandis Boheman, and that velocites in excess of 31.3 meters per second may be needed to free a weevil from its foothold on cotton leaves. In the late summer in Arizona and northern Sonora, Mexico, the necessary air turbulences (thermal convection and dust devils) are present to elevate boll weevils into the upper wind currents. Then these upper wind currents and their associated turbulences could move the weevils in the direction of the airflow.

Document Type: Research Article

Publication date: October 1, 1968

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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