First, spray lime sulfur mixture
Lime sulfur is a good bactericide. It can also kill insects and is corrosive. Spray, dormancy period with 3 - 5 Baume degrees spray. Can control powdery mildew, scale insects, leafhoppers and other pests and diseases. The lime sulfur is usually sprayed immediately after the winter cutting of the grape seedlings.
Second, buried cold
When the minimum temperature dropped to 0°C after the night of October 20, the buried soil was buried. The thickness of the buried soil reached 40 cm above the upper part of the shoot, and the top cover width of the cover soil must reach 60 cm and the bottom width was more than 140 cm to protect the root system from freezing damage. When the minimum temperature at night falls to -3°C (usually before November 5th), the earthwork must be completed. Early cold currents in individual years can cause frostbite, and they must be unloaded or covered under the cold current. Take care that the soil should be taken away from the roots as much as 80 cm away from the root.
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