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In the Yaqui Valley of Sonora in northwest Mexico, the saltmarsh caterpillar, Estigmene acrea (Drury), has caused severe damage and stand reduction to fall-planted corn during 1957 and 1958. Field observations and insectary studies indicate that the preferred native host plants both for oviposition and for larval development are Amaranth, Amaranthus palmeri S. Wats., and ground cherry, Physalis angulata L. Studies of the biology of E. acrea indicated that the time required for development from egg to adult is approximately 1 month during July, August, and September, when the largest populations are produced, and that four or five generations occur per year. Natural enemies of E. acrea observed in this region include a Coccincllid and a Malachiid attacking the eggs, and two species of Reduviids and a fungus attacking the larvae. In chemical control tests, Dipterex® (O,O-dimethyl 2,2,2-trichloro-1-hydroxyethylphosphonate) at 0.5 kg./ha. has shown promise. Toxaphene 2.9 kg., endrin 0.4 kg., ethyl parathion 0.5 kg., methyl parathion 0.5 kg., Thiodan® (6,7,8,9,10,10-hexachloro-1.5.5a.9,9a-hexahydro-6,9-methano-2,4,3-benzodioxathiepin-3-oxide) 0.5 kg., and heptachlor 1.0 kg. were not effective.
Document Type: Research Article
Publication date: December 1, 1959
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.