Toxicities of Three Insecticides to Five Species of Grasshopper Nymphs
Authors: Javadi, Iraj; Knutson, Herbert
Source: Journal of Economic Entomology, Volume 72, Number 6, December 1979 , pp. 906-908(3)
Publisher: Entomological Society of America
Abstract:Techniques were developed to obtain toxicological data on 3 pyrethroid insecticides by determining mortality of 2nd and 3rd instars of 5 species of grasshoppers, by using both field plot and simultaneous laboratory studies. Field studies involved small plots with natural populations separated by metal walls; laboratory studies simulated field application rates per unit area in glass boxes.
Permethrin produced virtually no mortality to Melanoplus bivittatus (Say), a substantially greater mortality to Boopedon auriventris McNeill and M. femurrubrum (De Geer), a still greater mortality to Orphulella speciosa (Scudder), and the highest mortality to Ageneotettix deorum (Scudder).
Decamethrin produced a substantial mortality to all species but the greatest to A. deorum. SD 41706® (cyclopropanecarboxylic acid, 2,2,3,3,-tetramethyl-alpha-cyano-3-phenoxybenzyl ester) produced substantial mortalities to all 5 species.
There was virtually no difference in mortalities between 2nd and 3rd instars 72 h after insecticide application nor between field and laboratory individuals within a particular species.
Document Type: Research Article
Publication date: December 1, 1979
- 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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