Due to insufficient attention to this disease and improper prevention and control methods, the problem of dry heartburn of Chinese cabbage is increasing year by year, especially in the plots planted for a long time, and the incidence is extremely serious. Therefore, the prevention and treatment of dry heartburn in Chinese cabbage should not be carried out blindly. On the basis of understanding the causes of the disease, targeted prevention and treatment should be carried out from the seedling stage, so as to achieve better prevention and treatment results.
today, in view of the problem of dry heartburn in Chinese cabbage, the agricultural technology small basket will tell you about the causes, symptoms, prone conditions and frequent plots of Chinese cabbage, as well as the prevention and control methods of Chinese cabbage from sowing, growth period and storage throughout the growth period. For our farmers who grow Chinese cabbage to learn from.
"Dry heartburn" in Chinese cabbage, also commonly known as "scorching edge disease", "rotten skin" or "dry heart disease" in some places, belongs to the physiological diseases that often occur during the growth period of Chinese cabbage, and is also the fourth largest disease type of Chinese cabbage after virus disease, rot disease and downy mildew. Dry heartburn of Chinese cabbage mainly occurs in the rosette stage and the heading stage of Chinese cabbage. Generally, it begins in the rosette stage and shows obvious disease symptoms after heading, and cabbage will rot in a large area during storage.
On the whole, the symptoms of dry heartburn mainly occurred in the middle leaves of cabbage bulbs, among which 2-1 leaves of cabbage bulbs had the highest incidence rate. The diseased cabbage looked normal in appearance, which was not much different from ordinary cabbage plants. However, after peeling off the outer leaves of cabbage bulbs, some heart leaves near the bulbs would have obvious disease symptoms, such as yellow or white or dry heart leaves, and some heart leaves were thin and dry. Generally speaking, in the early stage of the disease, the leaf edge at the top of the cabbage leaf ball curls outward, and the leaf edge will also appear yellow and withered. With the development of the disease, the damaged leaves will appear water-soaked, and the top of the leaves will slowly dry and yellow, which will lead to most of the leaves of cabbage drying and yellowing in the later stage of the disease.
Specifically, at the onset or early onset of the rosette stage of Chinese cabbage, the leaf edge of the new tender leaves will appear symptoms of dry leaf edge and inward curl, and the damaged Chinese cabbage will grow slowly or fail to complete the heading normally; Chinese cabbage is infected at the heading stage, and the symptoms are slightly different between the pre-heading stage and the post-heading stage. In the pre-heading stage, the top edge of the new tender leaves will show translucent water-soaked symptoms, and in the dry climate, it will become a white band with withering and dehydration. In the late stage of heading, the cabbage that has been wrapped seems normal to the outside, but the edge of the inner heart leaves will appear dry and yellow, brown or shriveled, scorched, and often produce irregular or banded lesions. Although the leaf bulbs will continue to grow, they are often not tightly wrapped and loose. If the infected cabbage is harvested and stored, it will be infected by bacteria in the later stage or lead to the problem of cabbage stem rot.