Bayer Aktiengesellschaft

Nihon Tokushu Noyaku Seizo Kabushiki Kaisha

Shin-etsu Handotai Co., Ltd.

Shin-Ichi Yamaguchi

Kozo Shiokawa

Nobuhiko Noto

Isao Yokokawa

Akio Kudamatsu

Shigeo Kishino

Iwao Takase

O-ethyl-S-n-propyl-dithiophosphoric acid phenyl or naphthyl esters, i.e. O-ethyl-S-n-propyl-O- or S-optionally substituted phenyl or naphthyl-phosphorothionothiol- or dithiolates, of the formula ##STR1## in which X is an oxygen or sulfur atom, and

Combating pests with O-ethyl-S-propyl-thionothiol or dithiophosphoric

O-ethyl-S-n-propyl-dithiophosphoric acid phenyl or naphthyl esters, i.e. O-ethyl-S-n-propyl-O- or S- optionally substituted phenyl or naphthyl-phosphorothionothiol-- or dithiolates, of the formula ##EQU1## in which X is an oxygen or sulfur atom, and

O-ethyl-S-propyl-dithiophosphoric acid phenyl or naphthyl esters

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Tokyo, Japan

Shin-Ichi Yamaguchi