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霜霉病是大棚黄瓜的第一大病害,若防治不及时,5～7天就可能全田发生和流行。防治霜霉病除了加强放风排湿、增施农肥和磷钾肥,及时施用农药以外,及时正确采用高温闷棚也是行之有效的防治措施。 科学实验证明,霜霉病菌在28℃以上时侵染不利,45℃时就停止活动而渐渐死亡。利用病菌这一弱点可进行高温闷棚来抑制和杀灭病菌,控制病害的发生。
Downy mildew is the largest greenhouse cucumber disease, if the prevention and treatment is not timely, 5 to 7 days may occur across the field and epidemic. In addition to strengthening the prevention and control of downy mildew wind and humidity, increased fertilizer and phosphorus and potassium, pesticide application in a timely manner, timely and correct use of high temperature bored shed is also effective prevention and treatment measures. Scientific experiments show that downy mildew bacteria in the negative when the infection at 28 ℃, 45 ℃, stop the activity and gradually died. Use of this weakness of bacteria can be bored at high temperatures to inhibit and kill bacteria, control the occurrence of disease.