Abstract
Aerial applications of DDT used for the control or eradication of gypsy moth (Porthetria dispar (L.) sometimes contaminate forage and pasture with the result that DDT residues may be present in the meat and milk of herbivorous animals. As substitutes for DDT Dibrom® (1,2-dibromo-2,2-dichloroethyl dimethyl phosphate), malathion, phosphamidon, and Sevin® (1-naphthyl N-methylcarbamate), which, with the exception of Dibrom, do not result in such residues, were applied by airplane to forest plots. Sevin at rates of 0.5 to 1.5 pounds in 1 or 1.5 gallons of oil and water suspensions per acre gave a very high degree of control of gypsy moth. A sticker of four ounces of raw tung oil per acre improved the resistance of deposits to removal by rain.
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