Synthesis,insecticidal and acaricidal properties of some 5-alkoxy-, 5-alkylthio-6-oxo-1-phenyl-1H-pyridazin-4-yl and 6-oxo-5-phenoxy-1-phenyl-1H-pyridazinyl phosphorus esters. II

A series of novel 5-alkoxy-, 5-alkylthio-6-oxo-1-phenyl-1H-pyridazin-4-yl and 6-oxo-5-phenoxy-1-phenyl-1H-pyridazin-4-yl phosphorus esters was prepared from the corresponding alkali pyridazin-4-olates and their insecticidal and acaricidal activities studied. Many of the compounds, especially the diethyl and dimethyl phosphates and OO-diethyl and OO-dimethyl phosphorothioates, showed high insecticidal and acaricidal activity.