Agro-kanesho Co., Ltd.

Michihiro Ohnaka

Shinzo Someya

Hiroshi Horino

Rokuro Akahira

Takashi Kiuchi

Disclosed herein are novel chloroacetanilide derivatives which act as remarkably effective herbicides when sprayed in a paddy field, the chloroacetanilide derivatives being 2',6'-diethyl-N-[(cis-alkenyloxy)methyl]-2-chloroacetanilides [A] represented by the general formula ##STR1## wherein R is a cis-form alkenyl group having 4 or 5 carbon atoms. Also disclosed are herbicide compositions for use in a paddy field and containing at least one of said chloroacetanilide derivatives [A] and at least one pyrazole derivative [B] represented by the general formula ##STR2## wherein R is a hydrogen atom or methyl group and X is a 4-toluenesulfonyl group or benzoylmethyl group; or-.alpha.-(2-naphtoxy)-propyonanilide [C] represented by the formula ##STR3##

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Yokohama, Japan

Michihiro Ohnaka