Authors: Roberts, S. J.; Zavaleta, L. R.; Grube, A. H.; Armbrust, E. J.; Pausch, R. D.

Source: Journal of Economic Entomology, Volume 80, Number 4, August 1987 , pp. 859-866(8)

Publisher: Entomological Society of America

Abstract:

A procedure for control of adult alfalfa weevil, Hypera postica (Gyllenhal), during the fall was analyzed and compared with the common practice of treating in the spring when indications of crop damage appear. Insecticides were sprayed when the majority of adult weevils were present in a narrow band at the perimeter of an alfalfa field. Data were collected and analyzed to test hypotheses about effectiveness of this practice. A model for economic evaluation of this technique was developed using dimensions of the field and the area treated, costs of pesticides, and probability of an outbreak of alfalfa weevil the following spring. As a control tactic, the fall perimeter-spray technique may have advantages over other alfalfa weevil control methods because of lower costs, fewer personnel and equipment hours required, and lower environmental impacts.

Document Type: Research article

Publication date: 1987-08-01

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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