Mechanism of the Phytotoxic Action of Herbicidal N-Isobutyl-N-(4-substituted benzyl)-4-halo-2-pentenamides
Kenji MATSUNARI, Tsutomu SHIMIZU, Fumitaka YOSHIDA and Toshio FUJITA
J. Pestic. Sci.
27, 9-16 (2002)
The N-isobutyl-N-(4-substituted benzyl)-4-halo-2-pentenamides show a potent light-dependent herbicidal activity against the barnyard grasses. The herbicidal mechanism was investigated with assay systems using cotton seedlings and an enzyme preparation from them as well as cultured unicelluar microalgae. Besides the protoporphyrinogen oxidase inhibition, some other mechanism(s) inhibiting step(s) involved in the chlorophyll biosynthetic pathway were suggested as the origin of the phytotoxicity.
