遵照毛主席关于“预防为主”的伟大教导,我们从1970 年以来,每年春、夏季普遍发动群众,用土法灭蛆,效果良好,使胃肠道传染病逐年下降。方法如下: 一、苦楝叶。将苦楝叶切碎,按每立方米3～5斤计算,投入粪坑,加入适量清水, Following Chairman Mao’s great teaching on “prevention first”, we have mobilized the masses every spring and summer of every year since 1970 to destroy maggots by using the soil method, and we have achieved good results in reducing the number of gastrointestinal infectious diseases year by year. The method is as follows: First, Melia leaves. Will Meliaceae leaves chopped, according to 3 to 5 pounds per cubic meter calculation, into the pit, adding an appropriate amount of water,