Larval clover root curculio (CRC), Sitona hispidulus (F.), were sampled with alfalfa host plants at intervals during the spring of 1983. Relationship between larval days (a measure of larval density over time) and amount of taproot damaged by larvae was determined. CRC damaged alfalfa taproots at the rate of 13.03 and 4.35 mm2 per larva per day for fourth and fifth instars, respectively. Second- and third-instar CRC did not contribute significantly to taproot damage. Feeding rate for fourth-instar CRC was estimated at 5.68 and 1.70 mg per larva per day for fresh and dry weight, respectively. The rate for fifth instars was estimated at 1.90 and 0.57 mg per larva per day for fresh and dry weight, respectively.
Document Type: Research Article
Publication date: April 1, 1986
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.