大棚黄瓜霜霉病生态防治方法研究——温度控制试验研究初报

Study on the ecological way of preventing cucumber downy mildew: A report of a control experiment on the environmental temperature.

黄瓜霜霉病是对黄瓜生长发育危害最大的世界性病害。通过两年共10个处理的田间对比试验发现,大棚黄瓜霜霉病的发生发展与环境温度条件存在着十分密切的关系,在一定温度范围内(15℃—48℃),棚内日最高气温越高,发病期越晚,病越轻,产量越高。控制方法是:在大棚内日最低气温稳定大于10℃后,每隔一天对大棚进行一次40—47℃、并维持2小时左右的高温处理(其中大于42℃持续1.5小时左右,大于45℃持续1小时左右),然后大面积通风换气。方法简便易行、效果很好。

Cucumber downy mildew is a rather serious plant disease damage in every place of world. The starting and prevailling of the disease relate closely to its environmental temperature. It can be prevented by proper high temperature condition, because the producing,growing and damaging of the disease spores can be inhibited by high temperature. The dates of starting and prevailling of the disease can be postponed and the damaging degree can be mitigated obviously by using an high temperature control way: raise air temperature in the plastic cucumber shed up to 40—47℃ by closing the door and air-inlet at about noon, last it more than two hours, and then,open the door and air-inlet for 'change air' and do it every second day. This preventing way can make the cucumber production increased about 45 per cent and it is more efficent than others.