Lime sulfur (English name)

Japanese: 石灰硫黄合剤 - せっかいいおうごうざい（英語表記）lime sulfur

An agricultural fungicide and insecticide with calcium sulfide as its active ingredient. Inorganic sulfur agent. The main active ingredient is calcium pentasulfide, with other active ingredients including lower calcium sulfide, calcium thiosulfide, and calcium sulfate. A transparent brown-red liquid. Strongly alkaline. It is produced by mixing quicklime and sulfur in a 1:2 ratio, adding water, and heating in a pressure cooker. This diluted solution is reacted with oxygen and carbon dioxide on the plant body to produce hydrogen sulfide and sulfur, which inhibit the activity of enzymes in disease bacteria and exert a fungicidal effect. It is used to treat diseases of wheat, apples, vegetables, and tea plants, as well as to eliminate pests such as scale insects and leaf mites.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

硫化カルシウムを有効成分とする農業用殺菌殺虫剤。無機硫黄剤。有効成分は主として五硫化カルシウムで，ほかに低位の硫化カルシウム，チオ硫化カルシウム，硫酸カルシウムを含む。褐赤色透明の液体。強アルカリ性。生石灰と硫黄を1:2の割合で混合し，水を加えて加圧釜中で加熱して製造する。この希釈液は植物体上で酸素，炭酸ガスの作用を受けて硫化水素や硫黄を生じ，これが病菌内の酵素の働きを阻害して殺菌効力を現す。麦類，りんご，野菜，茶樹などの病気および貝殻虫，葉だになどの害虫駆除に使用される。

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