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A substance that deters feeding of the boll weevil, Anthonomus grandis Boheman, was found in the filtrate of a water extract of tung meal, a byproduct of the process of extracting oil from the seeds (nuts) of the tung tree, Aleurites fordii Hems!. The same substance (or a related substance) was present in more concentrated form in tung oil. The deterrent effect of the substance (s) was greater than that produced by a water extract of calyxes From buds of Rose-of-Sharon, Hibiscus syriacus L. The sub- stance is readily soluble in water, resistant to moderate and volatilizes slowly. A 2- to 15-fold decrease occurred in the number of feeding punctures made by boll a weevils (compared with the controls) when cotton squares (buds) were dipped in a filtrate of water homogenized with tung meal that had been expeller-extracted. This deterrent effect was less when a filtrate of a homogenate of water and meal extracted by using hexane as a solvent was used and was greater when pure tung oil was used. In studies of serial dilution, the increase in deterrent effect was directly proportional to the increase in concentration of the filtrate. Antennectomy of boll weevils did not reheat, duce the deterrent effect.
Document Type: Research Article
Publication date: October 1, 1966
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.