What should I do if the temperature continues to low cabbage yellow leaves?

In early autumn, the temperature is appropriate and the cabbage grows vigorously. However, this year, many provinces in our province experienced continuous rainy weather, and the temperature continued to drop, which created opportunities for some common diseases of Chinese cabbage. The writer recently received a help phone from a Chinese cabbage grower near the Science and Technology Institute, and took the camera to the vegetable plot.

When I arrived at the cabbage field, I saw that the phenomenon of yellow leaves appearing in cabbages was particularly noticeable. Everyone knew that this cabbage was sick. By carefully observing the growth, diseased leaves, and lesions of cabbage, it was determined that this was cabbage downy mildew. This disease and cabbage soft rot and virus disease are also called "three major diseases of Chinese cabbage." This can easily occur during the planting process, especially in the present weather.

Disease diagnosis, I recommend 70% EB aluminum manganese zinc WP 500 times or 70% chlorothalonil WP 600 times or 72% urea manganese zinc (Ke Lu, Ke Kang Ling, rosin cyanide) 800 Spray 1000-1000 times, spraying once every 5-7 days. For the large strains that have already appeared, it is recommended to remove the diseased leaves first, and then apply the pesticides, while temporarily delaying watering, reducing waterlogging, and avoiding the further spread of fungal diseases.

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