Authors: DINTENF ASS, L. P.; BROWN, G. C.

Source: Journal of Economic Entomology, Volume 81, Number 6, December 1988 , pp. 1803-1809(7)

Publisher: Entomological Society of America

Abstract:

Field studies were conducted from 1983 to 1986 in two stands of alfalfa, Medicago sativa L., to investigate effects of feeding by larvae of the clover root curculio (CRC), Sitona hispidulus (F.). Total nonstructural carbohydrate root reserves were significantly reduced by CRC damage during the period of larval feeding. Root reserve reduction was correlated with the percentage of taproot surface area damaged, and this negative effect remained significant for about 1 mo after cessation of larval feeding. Significantly greater mortality of alfalfa plants occurred after 1 yr of CRC feeding in untreated plots compared with plots treated with soil insecticides. Significant dry weight yield reductions (approximately 14%) attributable to CRC injury occurred in the first and second harvests of 1984, in the second harvest of 1985, and in the third harvest of 1986. Dry weight yields were not significantly affected by CRC injury in 1983.

Document Type: Research article

Publication date: 1988-12-01

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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