Herbicidal Activity of Some Pyridazine Derivatives

Part II. 3-Halo- and 3-Anilino-6-phenoxypyridazines and Related Compounds

Abstract

Pre-emergent herbicidal activities of various 3-halo-6-phenoxypyridazines, with or without nitro groups on their benzene rings, and 3-anilino-6-phenoxypyridazines were examined along with those of related compounds. Among them, 3-bromo-6-(2' -phenylphenoxy)-, 3-chloro-6-(3'-nitrophenoxy)- and 3-chloro-6-anilino-pyridazines showed rather high herbicidal effects to radish and millet. On the other hand, some pyridazine derivatives especially 3-anilino-6-benzyloxy- and 3-(3'-chloroanilino)-6-phenoxy-pyridazines promoted shoot growth of millet.