Ibiden Company Limited

Teruaki Yokota

Katsuya Ohno

Tomohiro Nohara

Toru Nakai

Kenta Uemura

Kumiko Takada

Hiroko Takagi

The objective of the invention is to provide a plant activator with superior resistance-inducing activity and low toxicity and soil contamination. A plant activator comprising, as an active ingredient, an oxo fatty acid derivative of general formula (I):HOOC—(R)—C═C—C(═O)—R  (I)

Plant activator

The objective of the invention is to provide a plant activator with superior resistance-inducing activity and low toxicity and soil contamination. A plant activator comprising, as an active ingredient, an oxo fatty acid derivative of general formula (I):HOOC&#x2014;(R)&#x2014;C&#x2550;C&#x2014;C(&#x2550;O)&#x2014;R&#x2003;&#x2003;(I)(wherein, Ris a straight or branched alkyl group with 6 to 12 carbon atoms, and optionally comprises one or more double bonds, Ris an alkyl group with 2 to 8 carbon atoms, and optionally comprises one or more branches and/or double bonds) or a salt or an ester thereof.

The objective of the invention is to provide a plant activator with superior resistance-inducing activity and growth promoting activity and low toxicity and soil contamination. A plant activator comprising a fatty acid metabolite obtainable by a metabolism of a fatty acid with 4 to 30 carbon atoms by a proteobacteria under a dissolved oxygen concentration of 0.1-8 mg/L, and a method for manufacturing a plant activator comprising a fatty acid metabolite, comprising a step for fatty acid metabolism wherein a fatty acid with 4 to 30 carbon atoms is subjected to a proteobacterial metabolization under a dissolved oxygen concentration of 0.1-8 mg/L. A method for manufacturing a plant activator comprising a fatty acid metabolite, comprising a step for fatty acid metabolism wherein a fatty acid with 4 to 30 carbon atoms is subjected to a proteobacterial metabolization under a dissolved oxygen concentration of 0.1-8 mg/L.

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Gifu, Japan

Teruaki Yokota