Toxicity to Boophilus microplus of Formamidine Acaricides and Related Compounds, and Modification of Toxicity by Certain Insecticide Synergists


Source: Journal of Economic Entomology, Volume 66, Number 6, December 1973 , pp. 1245-1251(7)

Publisher: Entomological Society of America

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Twenty-nine formamidines and related compounds displayed activity toward engorged female southern cattle ticks, as judged by reduction in oviposition and egg viability, but only the most toxic adulticides showed activity against larvae. Certain methylenedioxyphenyl compounds markedly antagonized the toxicity of the aryl N,N-dimethylformamidines to larvae, but in most cases they synergized the toxicity of the aryl N-methylformamidines. This fact suggested that the aryl N,N-dimethylformamidines possessed little if any innate toxicity to cattle tick larvae. The high toxicity of 2 diaryl methyl triazapentadiene compounds to engorged females and larvae was attributed in part to their ability to hydrolyze to their respective aryl N-methylformamidine derivatives.

Document Type: Research Article

Publication date: December 1, 1973

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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