蔬菜连作地病害年年加重,产量年年下降,这是个必须解决而又较难解决的问题。 日本经多年研究,采用氯化苦成功地防治了南瓜、黄瓜、萝卜、辣椒、番茄、白菜类等多种蔬菜的土壤病害,防效高达85—100％。其方法是:整好畦以后, The problem of continuous cropping of vegetables increases year by year, yield drops every year, which is a problem that must be solved but difficult to solve. After many years of research in Japan, chloropicrin has successfully prevented and controlled soil diseases such as pumpkins, cucumbers, radishes, peppers, tomatoes, cabbage and other vegetables with the control efficiency as high as 85-100%. The method is: After finishing a good job,