I. Rotten root caused by Chinese cabbage roots 1. Root cause: Chinese cabbage is a semi-tolerant vegetable, with a warm and cold climate. It is not resistant to heat and cold. At the same time, Chinese cabbage is hi wet, but it is not. Under conditions of high temperature and hot or low temperature and cold, in case of continuous rain or flooding, Chinese cabbage will remain in water for a long time, which will cause root necrosis of cabbage roots due to lack of oxygen, and cause root collapse. In the early stage of Chinese cabbage growth, high temperature type alfalfa roots are prone to occur due to high ambient temperature, and low-temperature type alfalfa roots are likely to appear as the outside temperature decreases in the late stage of Chinese cabbage growth. 1 plot selection. Select high-lying, well-drained plots for sowing or planting so as not to create watery roots. 2 appropriate shade. In the early stage of Chinese cabbage growth, if it is exposed to high temperatures, shading nets may be used to shade properly to prevent the occurrence of high-temperature roots. 3 cultivating loose soil. Through cultivating loose soil, increase soil aeration and promote aerobic activity; the cultivator can also regulate the soil moisture status, which is conducive to root extension; in the late growth stage of Chinese cabbage, cultivating is also conducive to raising the temperature. 4 Control soil moisture. Drain the water immediately after the rain to prevent rain. When water shortage is needed in the soil, the amount of water should be suitable. It is forbidden to flood the water so as to prevent water from causing rooting. Second, Chinese cabbage rot caused by soft rot 1. Symptoms: The soft rot of Chinese cabbage usually develops on roots and base petioles. The petiole is spotted on the affected part. The outer leaf is dehydrated and wilting. It can be restored sooner or later. As the disease progresses, it no longer recovers. . The roots of the diseased roots are completely rotted at the base of the palatal tissues and petioles, filled with yellow sticky material, emit a special odor, and cause the whole plant to decay. 1 Agricultural measures. Avoid planting on low-lying, heavy-weight plots; select former plots for plots of grasses and legumes; avoid continuous cropping of solanaceae, melons, and cruciferous vegetables; level land, clear trenches, and take Sorghum cultivation; implement furrow irrigation, prevent flooding and flood irrigation; farm operations should be careful to avoid plant damage. 2 chemical control. At the early stage of onset of spraying, commonly used agents include 72% of agricultural streptomycin sulfate soluble powder 3000 to 4000 times liquid, neophytin 4000 times liquid, 14% colubrum ammonia copper water agent 350 times, 47% Garnett's wettable powder 700 to 750 times liquid. Spray once every 7-10 days, spray 2 or 3 times continuously. Disposable Latex Gloves,Disposable Vinyl Gloves,Nitrile Glove,Latex Glove ZHANGJIAGANG DINSHENGLIN TRADING CO.,LTD , https://www.dslhouse.com
2. Roots and roots symptoms: The roots of Chinese cabbage roots showed rotting in the roots, wilting in the ground, yellow leaves, and severe dead trees.
3. Preventive measures:
2. Incidence factors: Normal autumn warm season occurs heavy. The terrain is low and the plots with severe water are vulnerable to disease. Chinese cabbage in the heart of the disease in the case of high temperature, rainy and wet weather can easily occur. Excessive nitrogen fertilizer, plant leggy, and plants suffering from insect injury or mechanical trauma.
3. Preventive measures:
Chinese cabbage rotten
Cabbage rot is a common problem in the growth of Chinese cabbage. The main causes of rotting cabbage roots are roots caused by physiological diseases and rot caused by bacterial soft rot. Both of these diseases are related to excessive rainfall, high soil moisture and temperature fluctuations.