How to prevent Chinese cabbage from rot

In recent years, in addition to the soft rot that occurs all year round, the disease causing the decay of Chinese cabbage has also increased year by year.
First, the symptoms of performance (a) wilting disease. The onset of wilt disease begins at the 6-7 leaf stage, and the symptoms are characterized by fading from the bottom to the top, dullness, loss of water, and then the whole plant rapidly wilting until death. The roots of the diseased plants are short and few, and they are watery and rot. When the disease is serious, they are easy to pull up, cross-short and shorten the stem base, and the cut surface is light brown rot, no foul smell. This symptom is different from soft rot. (2) Soft rot. The onset of soft rot is mostly in the period of the nucleus. The semi-transparent infiltrating plaque appears at the base of the basal lobe. It gradually enlarges and turns white. The young tissue is watery and rot, and the old tissue loses water and shrinks. In the early stage of the disease, the outer leaves are wilting, and the morning and evening rainy days can still return to normal. As the condition worsens, the outer leaves collapse, causing the leaf balls to be exposed, and then become brown sticky and soft rot. Dip-dyeing develops from the base of the blade to the shortened stem, causing the root marrow to rot and overflowing with the grayish-smelly odor until the whole plant rots.
Second, prevention and treatment methods (A) agricultural measures. The first is to change the battle and avoid continuous work. The second is sorghum cultivation. Except for drought and water shortage and saline-alkali land, sorghum should be cultivated with a height of 5-10 cm. The third is to lightly water the small water to avoid flooding and flooding in time. The fourth is to increase the application of phosphorus and potassium fertilizer, and implement formula fertilization to enhance disease resistance. The fifth is to use live broadcast to avoid the infection of wounds caused by transplanting. The sixth is to remove the diseased plant, remove the diseased body and take it out of the field for deep burial. (2) Chemical control. 1. Wilt disease. In the early stage of the disease, 75% chlorothalonil WP 600 times solution, or 60% anti-virus WP WP 500 times solution, or 72.2% Plex water agent 600-800 times solution spray, every 7 Spray once every 10 days, and spray 2 or 3 times. For the seriously ill plot, 69% of Anke Mn-Zn wettable powder 900 times solution can be used for irrigation, and each plant is filled with 75-100 ml. 2. Soft rot. First, timely control of aphids, cabbage caterpillars, diamondback moths and underground pests. Second, in the early stage of the disease, 72% of agricultural streptomycin is used in 3000-4000 times of liquid foliar spray. The spraying is focused on the diseased plants and surrounding plants, and attention is paid to spraying the petiole and stem base close to the ground. Pine 700 times liquid irrigation roots.
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