Influence of Annual Spring Seeding of Alfalfa on Alfalfa Weevil1 Populations2

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Research was conducted on Ames Plantation at Grand Junction, Tennessee to determine if Hypera postica (Gyl- lenhal) infestations could be prevented or reduced by a change in cultural practice. It was postulated that if alfalfa were grown as an annual crop seeded each springinstead of as a perennial, weevil populations might be minimal because of the absence of the host crop during critical periods in the insect's biology.

The research was conducted at Ames Plantation because it comprised 18,000 acres where planting could be controlled and perennial alfalfa could be eliminated. It was found that spring-seeded alfalfa will escape serious in festation by the alfalfa weevil in Tennessee and probably as far north as the counties bordermg on the Ohio River in Indiana. This is because most weevil oviposition in the South occurs before the newly seeded crop emerges. It was found also that nonhardy varieties of alfalfa do not always winter kill. Therefore, to prevent weevil infestation by reseeding each spring with nonhardy varieties, fields should be rotated between other crops annually, or be plowed in the fall so that no plants survive to serve as reservoirs of infestation in the field.

Document Type: Research Article

Publication date: December 1, 1969

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  • 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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