| 摘要 |
The invention relates to novel unsubstituted or substituted 2-phenyl-5-pyridyl-4,5-dihydro-1,3,4-thiadiazoles of the formula <IMAGE> wherein R1 is hydrogen or C1-C4alkyl; R is hydrogen, C1-C4alkyl, halogen, nitro, cyano, C1-C4alkoxy, C1-C4alkylthio, C1-C4haloalkyl containing 1 to 9 halogen atoms, C1-C4haloalkoxy containing 1 to 9 halogen atoms, C1-C4haloalkylthio containing 1 to 9 halogen atoms, phenyl, substituted phenyl, phenylalkyl, substituted phenylalkyl, phenoxy, substituted phenoxy, phenylthio, substituted phenylthio, pyridyloxy or substituted pyridyloxy and n is a value from 1 to 5; and to the salts and optical isomers thereof; to the preparation of these compounds and to compositions containing them for use in pest control, in particular for controllng insects that attack plants and animals. The novel compounds exhibit in particular good activity against plant-destructive sucking insects. |
