Ishihara Sangyo Kaisha, Ltd.

Tomoaki Kezuka

Ryu Yamada

Takashi Terada

Hiroshi Kikugawa

Hiroshi Yoshii

Ema Mitsuno

To provide a method for managing a lawn at a site, such as a golf course, where turfgrass less sensitive to herbicides and turfgrass highly sensitive to herbicides are used in combination, without causing undesirable effects on the highly sensitive turfgrass. A herbicidal compound and a silicone surfactant are applied to a site where turfgrass less sensitive to the herbicidal compound is planted, thereby to reduce undesirable effects on nearby turfgrass highly sensitive to the herbicidal compound.

Method for reducing undesirable effects on turfgrass

At present, many herbicidal compositions have been developed and used, but there are a variety of types of weeds to be controlled, and their development lasts for a long period of time. Thus, a high active and long-residual herbicidal composition having a broad herbicidal spectrum has been desired. The present invention provides a synergistic herbicidal composition comprising (A) flazasulfuron or its salt and (B) at least one urea compound selected from the group consisting of tebuthiuron, diuron and metobromuron or its salt. According to the synergistic herbicidal composition of the present invention, a high active and long-residual herbicidal composition having a broad-spectrum can be provided.

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Osaka, Japan

Tomoaki Kezuka