Ethion is identified chemically as O,O,O',O'-tetraethyl S,S'- methylene diphospholodithioate and has been known under the name of Niagara 1240. Results from 2 years of field tests demonstrated that the compound was effective against two species of aphids on apples, two species of foliage mites and the codling moth. On apples 2 pounds of 25% wettable powder per 100 gallons, applied when trees were either in dormant or delayed-dormant stage of development gave good control of the apple grain aphid, Rhopalosiphum fitchii (Sand.) and the rosy apple aphid, Anuraphis roseus Baker. One pound of ethion wettable powder per 100 gallons applied in pre-pink or in the early postbloom period provided control of the European red mite, Panonychus ulmi (Koch). When applied in mid-season ethion at the rate of 1 pound of 25% wettable powder was also effective for the control of the two-spotted spider mite, Tetranychus telarius (L.). The use of ethion at the 2-pound rate in all post-bloom sprays resulted in control of the codling moth, Carpocapsa pomonella (L.), equal to such standard control chemicals as lead arsenate, DDT and parathion. Lower concentrations were not commercially effective.
Document Type: Research Article
Publication date: June 1, 1958
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