SYNTHESIS AND MITICIDAL AND INSECTICIDAL ACTIVITIES OF 4-(2-FLUOROETHYL)-5,6-DIHYDRO-4H-1,3,4-OXADIAZINES

Dihydrooxadiazines, substituted by a fluoroethyl chain, were prepared by reaction of benzhydrazides with 2 molar equiv of bromofluoroethane. Ten compounds with various substitutions on the phenyl ring were comp ared with clofentezine, a commercial miticide, for miticidal activity against the egg stage of Tetranychus urticae; the compounds were also compared with thiodicarb, a commercial tobacco budworm insecticide, fo r insecticidal activity against the egg stage of Heliothis virescens. The mortality data were correlated with the phenyl substitution in the tested compounds. Some halophenyl oxadiazines showed greater miticida l and insecticidal activities than the commercial standards.