Mitsui Petrochemical Industries, Ltd.

Kumiai Chemical Industry Co., Ltd.

Tatsuyodihi Ishida

Yasuo Nakamura

Takeshige Miyazawa

Isao Hashimoto

Katsuya Takahashi

Susumu Katou

Yuji Yamada

Kazutaka Tsuru

A substituted aryloxyurea of the formula: ##STR1## wherein Ar represents ##STR2## in which X.sup.7 represents a hydrogen atom, a halogen atom, a cyano group, a lower alkoxy group or a trifluoromethyl group, and

Substituted pyridyloxyureas and use thereof as herbicides

Novel substituted aryloxyureas, processes for their production, and herbicides comprising them as active ingredients are provided. The substituted aryloxyureas exhibit an excellent herbicidal efficacy against weeds when applied, for example, to the weeds in a wide range of period from a preemergence stage to a growth stage. The substituted aryloxyureas of the invention have the excellent advantage of maintaining high safety on crops or crop plants in spite of their herbicidal efficacy.

Substituted aryloxyureas, processes for production thereof and uses

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Ohtake, Japan

Tatsuyodihi Ishida