Herbicidal Activity of Some Pyridazine Derivatives

Part I. Pyridazyl Phenyl Ethers

Abstract

Herbicidal activity of some 50 pyridazyl ethers was evaluated. Among them, 3-chloro-6-(2-phenylphenoxy)-, 3-chloro-6-(2, 6-dichlorophenoxy)-, 3-chloro-6-(3-methoxyphenoxy)-and 3-chloro-6-(4-methoxyphenoxy)-pyridazines showed conspicuous effectiveness on radish and milletin pre-emergence test, whereas postemergent activity of the compounds tested was not so remarkable in general. Relationships between herbicidal activity and chemical structure are discussed.