Rieger Beggar Gray Mold Control Methods
Rieger Beggar Symptoms: Botrytis cinerea usually appears on the lower leaves of cuttings that come into contact with the upper basin matrix. Water spots can quickly enlarge most or even the entire cuttings. Over time, the area of ​​infestation becomes brownish black to black. When the night temperature is lower, the daily temperature is higher, and the humidity is also high, pathogens can easily form spores on the leaves and form gray-green conidia.
Control methods: control of gray mold in the closed greenhouse in winter is particularly important. Control the small environment and maintain air circulation. At night, keep the surface of the leaves dry and reduce the humidity. The fungicide can be sprayed with Yi Li and Botrytis cinerea.
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