1964—1965年我们曾采用防治水稻纹枯病的特效药“甲基硫化砷”(又称苏化911)及“甲基砷酸钙”(又称6401)对油松幼苗猝倒病进行生产性示范试验。结果表明,该两种药剂均比赛力散(含量2.52%)防治效果为好,深受生产单位的欢迎。鉴于“苏化911”的防治效果已有报道(请参阅本刊1965年22期),现将甲基砷酸钙对油松幼苗猝倒病的防治效果简介如 From 1964 to 1965, we used the special drugs for controlling rice sheath blight, “Methylthionated arsenic” (also known as Suhua 911) and “Methyl arsenate” (also called 6401) Retirement to carry out productive demonstration test. The results showed that the two kinds of drugs were scattered (2.52% content) control effect is good, well received by the production units. In view of the control effect of “Suhua 911 ” has been reported (see article 1965 22), is now methyl-calcium arsenic pine seedling damping-off disease prevention and treatment effect