Gyoto - Gyoto

Japanese: ギョトウ - ぎょとう
Gyoto - Gyoto

...It is said to contain less rotenone than Derris tuba, but the yield is large. Other Derris species that contain rotenone include D. ferruginea Benth. (English name: Indian tuba) from eastern India and D. triforiata Lour. (fish wisteria) from Assam to southern China, and are also used. Derris powder began to be used in Japan at the end of the Taisho era, and was one of the important insecticides until chemical insecticides were mass-synthesized, and was widely used as derris powder, emulsion, and soap preparations. ...

From [Poison]

In the narrow sense, it refers to a substance that is harmful to living organisms or has a life-threatening effect even in very small amounts, and is generally called a poison. However, in Japanese law, a poison is a substance designated by the Minister of Health, Labor and Welfare under the Poison and Deleterious Substances Control Law, and includes preparations containing yellow phosphorus, tetraalkyl lead, inorganic cyanide compounds (such as potassium cyanide), mercury compounds, arsenic compounds, curare, and nicotine. In the broad sense, it refers to all substances that have a harmful effect on living organisms. Many chemical substances have harmful effects depending on the amount taken into the body, so in this sense, medicines and table salt can also be said to be poisons depending on the amount.

*Some of the terminology explanations that mention "Gyoto" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ロテノン含有はトバより少ないといわれるが,収量は多い。ほかにデリス属でインド東部産のインドトバD.ferruginea Benth.(英名Indian tuba),アッサムから中国南部に分布するギョトウ(魚藤)D.triforiata Lour.などにもロテノン成分が含有されており,利用される。 デリス粉末は,日本では大正時代末から利用が始まり,化学殺虫剤が大量に合成されるまでは重要な殺虫剤の一つで,デリス粉剤,乳剤,セッケン製剤として広く使用された。…

【毒】より

…狭義にはきわめて少量でも生体に有害な,あるいは生命にかかわる作用をもつ物質をいい,一般に毒物と呼ばれている。ただし日本の法律でいう毒物とは〈毒物及び劇物取締法〉によって厚生大臣に指定された物質をいい,黄リン,四アルキル鉛,無機シアン化合物(青酸カリなど),水銀化合物,ヒ素化合物,クラーレ,ニコチンなどを含有する製剤がこれに該当する。広義には生体に有害な作用をもつ物質全般を指す。多くの化学物質は生体に取り込まれる量によって有害作用をもつので,この意味では医薬品や食塩なども量によって毒となるといえる。…

※「ギョトウ」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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