| abstract |
O-Alkyl-O-[6-substituted pyridazin(3)yl]-thiono) (thiol)alkanephosphonic acid esters of the formula <IMAGE> (I) in which X and Y each independently is oxygen or sulfur, R1 is alkyl with 1 to 6 carbon atoms, R2 is alkyl with 1 to 4 carbon atoms, R3 is alkoxy with 1 to 4 carbon atoms, alkynyloxy with 2 to 5 carbon atoms, alkylsulfonyloxy with 1 to 3 carbon atoms, monoalkylcarbamoyloxy with 1 to 3 carbon atoms, halogen, benzyloxy, benzoyloxy, phenoxy, or phenoxy carrying at least one substituent selected from halogen, nitro, cyano, -SO2CH3, -SO2CH2Cl, and alkyl, halogenalkyl or alkylthio, each with up to 3 carbon atoms, and R4 is hydrogen or alkyl with 1 to 3 carbon atoms, which possess insecticidal , acaricidal, nematicidal and fungicidal properties. |