Japan Hydrazine Co., Ltd.

Kao Corporation

Kao Soap Company, Ltd.

Eiichi Kimura

Tetsuji Iwasaki

Shiro Hojo

Tsuneyuki Takeno

A novel plant growth regulator composition comprises a salt of 1,2-dihydropyridazine-3,6-dione and an ammonium alkylsulfate as an adjuvant at a molar ratio of 1/0.02 to 1/0.5. The above composition has remarkable supressing actions for sucker growth, sprouting and twing growth, and allows only a very small amount of hydrazine formation during a long preservation term. The composition can thus be safely applied to edible plants.

Plant growth regulator composition

A plant growth regulating composition comprising the choline salt of 6-hydroxy-3(2H)-pyridazinone and, as adjuvants, a polyoxyethylene oleyl ether and a triethanolamine alkyl-sulfate. The composition according to this invention can be prepared at a lower production cost and is easy to apply. When applied, it exhibits low toxity, and good penetration and transferability.

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Takamatsu, Japan

Eiichi Kimura