Effect of Naled, Trichlorfon, and Bacillus thuringiensis on Three Species of Lepidopterous Larvae Attacking Alfalfa in California1


Source: Journal of Economic Entomology, Volume 61, Number 5, October 1968 , pp. 1324-1327(4)

Publisher: Entomological Society of America

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In 1967 there was an outbreak of the western yellow-striped armyworm, Prodnia praefica Grote, and the alfalfa caterpillar, Colias eurytheme Boisduval, in thousands of acres of alfalfa in the central valley of California. The beet armyworm, Spodoptera exigua (J-Hübner), also was present but was not sufficiently abundant to cause damage by itself. Bacillus thuringiensis Berliner (Thuricide®; "SS") (Batch no. D05712; label claim minimum of 15X109 viable spores per gram) was applied at 1 pint and 2 quarts per acre, while naled and trichlorfon were applied at 7.2 and 8 oz actual, respectively, per acre on alfalfa to test their effectiveness on these 3 species. Both dosages of Thuricide gave excellent control of the alfalfa caterpillar as did naled and trichlorfon. The data indicate that slightly higher dosages of naled and trichlorfon are required to give satisfactory control of the beet armyworm and the western yellow. striped armyworm. Thuricide had no effect on these 2 species. Ecological comments on these 3 species are presented.

Document Type: Research Article

Publication date: October 1, 1968

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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