霜霉病在黄瓜生产上是一种毁灭性的病害,其病势迅猛,往往在发病后1周～2周内引起全田植株枯黄。笔者近几年的调查表明,该病在合肥市郊区日趋严重,减产幅度为30％～45％,甚至只收1次～2次即提前拉秧,严重影响了市场供应,减少了菜农的收入。为解决生产上的实际问题,探索采用高效低毒低残留低成本的药剂,以有效地控制其病害的发展,我们植保组于1992年用70％代森锰锌-乙磷铝复配药剂,对秋黄瓜霜霉病进行了防治试验。现将试验结果介绍如下。 Downy mildew in the production of cucumbers is a devastating disease, its rapid disease, often in the disease within 1 week ~ 2 weeks caused the whole plant yellow. In recent years, the author’s survey shows that the disease is becoming more and more serious in the suburbs of Hefei, with the rate of decrease being 30% -45%. Even the larvae are lifted 1-2 times in advance, seriously affecting the market supply and reducing the income of vegetable growers . In order to solve practical problems in production and to explore the use of low-toxicity, low-residue, low-cost pharmaceuticals to effectively control the development of their diseases, our plant protection team used 70% Mancozeb-Phosphorus-Aluminum Complex Agent in 1992, Autumn cucumber downy mildew prevention and control test. Now the test results are as follows.