Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Volatilization of Methyl Parathion from Fields Treated with Microencapsulated and Emulsifiable Concentrate Formulations.
Author Jackson, Merrill D. ; Lewis, Robert G. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC. Environmental Toxicology Div.
Year Published 1979
Report Number EPA/600/J-79/008;
Stock Number PB-294 830
Additional Subjects Insecticides ; Air pollution ; Phosphorus organic compounds ; Encapsulating ; Vaporizing ; Emulsions ; Particles ; Farm crops ; Methyl parathion ; Phosphorothioic acid/0-0-(dimethyl-ester)-0-(nitrophenyl-ester) ; Reprints
Library Call Number Additional Info Location Last
NTIS  PB-294 830 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 6p
Volatilization of pesticides from treated agricultural crops constitutes a major input of these chemicals into the atmosphere. Microencapsulated pesticide formulations are designed for slow release of biocides and thus increase the residence time on the plant foliage. The rate of volatilization for these formulations should also be substantially less than that from non-encapsulated forms. Methyl parathion was applied to a field in both microencapsulated and emulsifiable concentrate forms. Air samples were taken on the downwind side of the field with a sampler which employs a composite filter designed to trap both particulate and vapor forms of organophosphorus pesticides. Air was sampled beginning 1 hr. after spraying and during intervals for 9 days after application of the insecticide. The physical form of the formulation applied to the plants had a profound effect on the levels of airborne pesticides found near the field.