INTERACTION BETWEEN PHOSCARBAN AND ESTERA SES OF HOUSE-FLIES AND SYNANTHROPIC COCKROACHES

Interactions of phoscarban and its ''oxon'' with the esterase complex of the house-fly image and four species of synanthropic cockroaches we re studied. Phoscarban and its oxon have a wide spectrum of effects on the esterase complex in cockroaches and flies. These compounds are no t specific inhibitors of any of the zones of esterase activity. Their insecticide effect depends on their ability to inhibit both choline es terases, which are responsible for nervous activity, and carboxyl este rases, which are involved in the detoxication of these compounds. We s tudied the species specificity of the esterase complex, including indi vidual types and fractions, to phoscarban and its oxon in the order Di ctyoptera. It was especially distinct for membrane-bound and water-sol uble forms of choline esterases.