| 摘要 |
NEW MATERIAL:A compound of formula I (R is H or alkyl which may be divided by O, S, etc. or substituted by halogen, phenyl or phenoxy). EXAMPLE:S-3,4-Dichlorobenzyl thioacetate. USE:A soil germicide very effective against fusarium wilt of cucumbers and tomatoes, blight caused by Fusasium oxysporn Schelechendahl, f. melongenae Matuo et Ishigami of eggplants, fusarium yellows of cabbages, etc. with very low toxicity to humans and cattle. PREPARATION:An acid halide or an acid anhydride of formula II is reacted with 3,4-dichlorobenzyl mercaptan of formula III to give the aimed compound of formula I . The reaction is preferably carried out using a solvent, which is not essential. The compound of formula I is a soil germicide without giving phytotoxicity to crops nor requiring gas venting operation, etc. and contributing to controlling with saved energy.
|
