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Phostex, bis(dialkyloxyphosphinothioyl) disulfides, where the Alkyl groups are ethyl and 2-propyl in a ratio of three to one, is n phosphate insecticide-acaricide of low mammalian toxicity (acute oral LD50, 2500mg./kg. to white rats). Phostex has given excellent control of the pear leaf blister mite, Eriophyes pyri (Pgst.), on pears during 2 years of development and 1 year of commercial use. No injury was detected on pears when Phostex emulsifiable concentrate was used alone in the fall (postharvest) or delayed dormant or when Phostex was used in combination with oil during the dormant period. Phytotoxicity has been observed where Phostex was applied to the foliage of most stone fruits; however, no injury to these trees has been observed with dormant sprays of Phostex-oil combinations.
Document Type: Research Article
Publication date: April 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.