S-(1,6-DIHYDRO-6-THIOXO-PYRIDAZIN-(1)-YLMETHYL)-(THIONO)-(DI)-THIOL-PHOSPHORIC(PHOSPHONIC)ACID ESTER DERIVATIVES AND ESTER-AMIDE DERIVATIVES,THEIR PREPARATION AND THEIR USE AS INSECTICIDES,ACARICIDES AND NEMATICIDES

摘要

O-Alkyl-S-[1,6-dihydro-6-thioxo-pyridazin-(1)-yl methyl]-(thiono)-(di)-thiol-phosphoric (phosphonic) acid esters and ester-amides of the formula IMAGE (I) in which R is alkyl with 1 to 6 carbon atoms, R1 is alkyl, alkoxy, alkylmercapto or alkylamino with a maximum of 6 carbon atoms per alkyl chain, R2 is halogen, alkoxy with 1 to 5 carbon atoms or alkyl with 1 to 5 carbon atoms, R3 and R4 each is hydrogen or conjointly form a fused benzene ring, and X is oxygen or sulfur atom WHICH POSSESS NEMATICIDAL AND ARTHROPODICIDAL, E.G. INSECTICIDAL AND ACARICIDAL PROPERTIES.