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近年来由于黄瓜保护地栽培的迅速发展,霜霉病的为害越来越严重。目前,生产上多用药剂防治,这不仅成本提高,污染环境还影响采收期,本文就不用药剂防治霜霉病的方法做一介绍: 一、选用抗病品种: 省蔬菜所培育的冀黄瓜二号抗病性较强,另外采用杂交一代也是防治霜霉病的途径之一。二、生态防治: 1、调节温湿度。白天上午密闭、使温度提高到30—32℃,利于黄瓜生长,而不利于霜霉病的发生;午后放风,下午温度降到20—25℃,湿度降到60—70％,也可有效地控制霜霉病的发生;晚上,主要在日落后1—2小时进行放风,降低棚内湿度。 2、利用高温抑制霜霉病的发展。保护地可于晴天中午密闭温室或大棚(棚内挂温度表,高度要和黄瓜生长点平行),使棚温自然上升,到生长点
In recent years due to the rapid development of cucumber protected cultivation, downy mildew damage more and more serious. At present, the production of multi-purpose pharmaceutical control, which not only cost increases, polluting the environment also affect the harvest period, this article does not use agents to prevent downy mildew approach to make an introduction: First, the selection of resistant varieties: It is one of the ways to prevent downy mildew by adopting hybrid generation. Second, ecological control: 1, adjust the temperature and humidity. Closed during the daytime, the temperature increased to 30-32 ℃, conducive to the growth of cucumber, but not conducive to the occurrence of downy mildew; afternoon wind, the afternoon temperature dropped to 20-25 ℃, humidity dropped to 60-70%, but also effectively Control the occurrence of downy mildew; night, mainly in the 1-2 hours after the sunset wind, reduce shed humidity. 2, the use of high temperature inhibit the development of downy mildew. Protected land can be closed at noon on a clear day in the greenhouse or greenhouse (shed temperature meter, height and cucumber growth point parallel), so that shed temperature rise naturally to the growing point