O,O-Di-alkyl-O-(1-6-pyridazinon-3-yl)-(thiono)-phosphoric acid esters and their pesticidal use

摘要

O,O-Di-alkyl-O-(1-6-pyridazinon-3-yl)-(thiono)-phosphoric acid esters of the formula <IMAGE> (I) in which R is methyl or ethyl, R1 is alkyl with 3 to 5 carbon atoms or alkoxyalkyl with 1 to 3 carbon atoms in each alkoxy and alkyl moiety, R2 is hydrogen, nitro, halogen or alkyl with 1 to 6 carbon atoms, and X is oxygen or sulfur, WHICH POSSESS INSECTICIDAL AND ACARICIDAL PROPERTIES.