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霜霉病发病快、易流行、危害重,是棚室黄瓜生产的首害。据试验,当棚室黄瓜霜霉病来势凶猛、约液防治不能奏效时,应用高温闷棚法可基本控制病情发展,且无公害。 1、时间。闷棚宜在发病初期或流行前、并选择晴天进行。土壤干旱时,需在头天浇足水,增加空气湿度,以提高升温灭菌效果。 2、方法:早晨先放风,当外界温度升高时,关严风口,使棚温迅速升至42—48℃,并保持2小时,但不能超过48℃;当温度达不到42℃时,用其它加温
Downy mildew incidence of fast, easy to epidemic, endangered, is the first production of greenhouse cucumbers. According to the test, when the greenhouse cucumber downy mildew ferocious, about liquid prevention and treatment can not be effective, the application of high temperature bored shed law can basically control the disease development, and pollution-free. 1, time. Nauseous shed should be early in the onset or pre-epidemic, and choose sunny days. Soil drought, the need to pour enough water in the days, increasing air humidity, in order to improve the heating sterilization. 2, Method: In the morning, the air is first discharged. When the external temperature rises, the air outlet is closed, the temperature of the greenhouse is rapidly raised to 42-48 ° C for 2 hours but not more than 48 ° C; when the temperature does not reach 42 ° C, With other heating