Chinese cabbage soft rot, also known as "rotten glutinous rice," is a devastating disease in the production of Chinese cabbage. If it occurs, it can be turned into a piece. At present, Chinese cabbage has entered the heart of the package, and soft rot has become a major problem in current production, prompting farmers to prevent and treat it in a timely manner.

symptom

There are three types of soft rot common in Chinese cabbage: 1 The external leaves are wilting, and the vegetable stage is wilting at noon on sunny days in the rosette stage, but it recovers sooner or later. After a few days, the outer leaves of the diseased plants are flat on the ground and the heart or leaf ball is exposed. The medullary tissue of the petiole stem or rhizome is festered, and the grayish-brown viscous material flows out. The lightly touched diseased plant is festered and festered; the pathogenic bacteria invade through the wound at the base of the vegetable, forming a water-saturated infiltrating area and gradually expanding into a pale grayish brown. The diseased tissue was sticky and soft and rot-like. 3 The bacteria were invaded by the petiole or the edge of the outer leaf or the tip of the leaf ball, causing rot. The above-mentioned three types of symptoms under dry conditions, rotten diseased leaves gradually dehydrated and dried by the sun, was thin paper-like, close to the leaf ball. The odor of hydrogen sulfide is generated in the diseased rot, which becomes an important feature of this disease and is distinguished from black rot.

Control methods

1. Choosing the fields of former wheat and legumes for planting cabbage to avoid continuous cropping with Solanaceae, melons and other cruciferous vegetables.

2. Change the planting mode and change the traditional flat planting to ridge planting.

3. Implement furrow irrigation or sprinkler irrigation to prevent flooding.

4. In areas with severe disease, the resistant varieties were selected, and the tall varieties or young leaves were generally selected, such as Beijing New No. 3, Jincao No. 3, and Taiyuan Erqing. If you have to plant a ball type, such as Fengkang 80, etc., can be appropriately postponed sowing time, change to 2-4 days after the beginning of autumn sowing, or seedling transplanting. In this way, cabbage cabbage balls can be avoided from the high-temperature and high-humidity period, reducing soft rot caused by high temperature and humidity.

5. The appropriate sowing, vigorously promote the ribbon planting, to avoid man-made wounds caused by agricultural operations such as fertilizer and medicine.

6. Seed agent treatment and spray. (1) After sowing with 150 grams of cabbage seeds mixed with “Fengling” 50-100 grams; (2) Spraying “Fengling” 100-150 grams per acre with 50 liters of water at the seedling stage; (3) Watering with “Fengling” 150-250 g 100 L, digging along the vegetable roots, due to the disease long seedling period of infection, the infection site more, in the secondary seedlings or secondary Dingmiao again 1, to improve control efficiency.

7. At the beginning of the disease, spray 72% of agricultural streptomycin sulfate soluble powder 3000 times, 3% of mesogenic bacteria wettable powder 800 times, 50% of chlorobromoisocyanuric acid soluble powder 1200 times, 25% of ammonia nitrogen copper zinc water 500 times liquid, 47% spring king copper (garenone) WP 750 times, every 10 days, even prevention 2-3 times, can also cure black rot, bacterial angular spot, dark spots Illness and so on. However, sensitive varieties of copper preparations should be used with caution. At present, it has entered the Chinese cabbage cabbage filling period. If sporadic soft rot strains are found, they should be immediately removed and taken out of the field. Lime should be sprinkled in the pits of the diseased plants. After mixing, the feet should be filled with water and the water should be continued. The agent is sprayed and controlled.

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