In laboratory experiments, 60 and 400 m crystal length DDT deposits were compared for toxicity to ant species of different size. After 60 h of exposure of the larger species, Lasius fuliginosus Latreille, the LD90 was 1.54 g/cm2 on the smaller crystals, not significantly different to 1.67 g/cm2 on the larger crystals. After 60 h of exposure of the smaller species, L. flavus F., the LD90 was 0.74 g/cm2 on the smaller crystals, significantly different to 3.11 g/cm2 on the larger crystals. Selective toxicity was recorded. On 1.091 g/cm2 deposits of 60 m length crystals, LD90 of 22.21 h for the smaller species L. flavus was not significantly different to LD50 of 26.76 h for the larger species L. fuliginosus. However on 1.091 g/cm2 deposits of 400 m length crystals, LD90 of 54.62 h for the larger ant species was significantly less than 76.7 h LD50 for the smaller ant species.
Document Type: Research Article
Publication date: April 1, 1975
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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.