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New Insecticides Against Adults of Two Species of Hippelates Eye Gnats1

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Twenty new compounds were evaluated for biological activity Against Hippelates collusor (Townsend) (the predominant eye gnat species in the Southwestern States) and H. pusio Loew. Both species reacted in essentially the same way to most of the compounds. Sumithion® (O,O-dim ethyl 0-4-(nitro-m-tolyl) phosphorothioate), mevinphos (Phosdrin®, Bayer 37289 (O-ethyl O-2,4,5-trichlorophenyl ethylphosphonothioate), Bayer 37343 (O-<3,5-trichloro-4- (methylthio) phenyl] O,O-diethyl phosphorothioate), and SD-7587 (1-(p-chlorophenylthio) vinyl dimethylphosphate) were most effective. Sumithion and Bayer 37343 have relatively low mammalian toxicities.

Knockdown effects of 6 carbonates were also studied. Among these Isoland® (1-isopropyl-1-3-methyl-5-pyrazolyl dimethylcarbamate) produced the quickest knockdown, followed by dimetilan, Bayer 37344 [4-(methylthio)-3,5-xylyl methylcarbamate] and Pyramat< (6-methyl-2-propyl-4-pyrimidinyl dimethylcarbamate). It is pointed out that quick knockdown effects of less effective compounds may be undesirable from the standpoint of abating insects for longer periods.

Document Type: Research Article

Publication date: August 1, 1964

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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.
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