Cucumber downy mildew is one of the most serious diseases that damage the production of cucumber in solar greenhouses. It occurs almost every year, and the time of onset is getting earlier and earlier, and the condition is increasing year by year, causing great losses to farmers. So, how can we effectively prevent and cure cucumber downy mildew? The author used gas lighters to burn lesions in the production practice for several years and obtained good control effects.
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According to the investigation, no recurrence of lesions has occurred in any burned lesions, regardless of environmental conditions. Because when the fire burns, the temperature at the lesion is very high, and 1 to 2 seconds can completely burn the bacteria. When using this method, always observe carefully. Once the spotted lesion is found, it should be immediately burned. In particular, it is easy to occur first in places where the humidity is high, such as in the lower part of the greenhouse, in the dripping area. When the fire is burning, the diseased leaves should be laid flat, and the flame tip can be burned for 1 to 2 seconds under the leaves. Afterwards, only a small white spot will be left at the point of burning, which will not affect the growth of other parts of the leaf.