去年,我市郊区黄瓜受霜霉病和白粉病为害,总产比1972年减少32％。茄子由于受黄萎病为害,平均减产20～30％。西红柿、辣椒病毒病也比历年发生严重。为了防治蔬菜病害,必须坚持“以防为主,防重于治”的方针,采取下列综合防治措施。 1.选择抗病品种:在去年病害大发生的条件下,各种蔬菜都有一 Last year, cucumber in our suburbs was affected by downy mildew and powdery mildew, with a total output of 32% less than in 1972. Eggplant damage due to Verticillium wilt, the average cut 20 to 30%. Tomatoes, pepper virus disease than in the past serious. In order to prevent and cure vegetable diseases, we must adhere to the principle of “taking prevention as the mainstay and prevent heavy losses as the rule” and adopt the following comprehensive prevention and control measures. 1. Choose disease-resistant varieties: a variety of vegetables have one under the conditions of the disease occurred last year