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大白菜霜霉病历年来在华北各地普遍发生,并且有的年分发生非常严重,造成很大损失。山东省在1952、1956、1958及1959年白菜霜霉病大流行,致使大白菜减产达30%左右,甚至有的菜园没有什么收获。因此,解决霜霉病的防治问题已成为普遍的迫切要求。以往防治霜霉病常用400倍式的波尔多液,虽有一定效果,但极易发生药害,且药效并不理想。为此,我们自1954年至1961年连续进行大白菜霜霉病药剂防治比较试验,希望肯定一两种最经济而有效的药剂。1954—1958年试验是在济南进行的,1959—1961年试验是在太安进行的。茲将八年来的试验结果简报如下。
Cabbage downy mildew over the years in North China throughout the occurrence, and some very serious years, causing great losses. Shandong Province in 1952, 1956, 1958 and 1959 cabbage downy mildew pandemic, resulting in cabbage cut about 30%, and even some vegetable gardens did not gain anything. Therefore, to solve the problem of downy mildew has become a universal pressing requirement. Previous prevention and cure downy mildew commonly used 400 times Bordeaux mixture, although a certain effect, but prone to injury, and the efficacy is not satisfactory. For this reason, we conducted a series of comparative experiments on the control of cabbage downy mildew from 1954 to 1961, hoping to affirm one or two of the most economical and effective agents. The 1954-1958 experiment was conducted in Jinan, and the 1959-1961 experiment was conducted in Taian. Here’s the result of the experiment in eight years.