Prevention and cure method of cabbage soft rot
With the continuous expansion of the planting area of ​​Chinese cabbage, the soft rot of cabbage has become more and more serious, so it is necessary to control the soft rot of cabbage. Cabbage soft rot disease Cabbage soft rot is caused by bacteria, which occurs from the rosette period to the center of the cabbage. According to different infection sites, cabbage soft rot can be divided into three types.
(1) Root infestation type: The pathogen invades from the root wound, causing soft rot. The symptoms are that the vegetable plants shrink at noon on sunny days, but they recover sooner or later. After a few days, the outer leaves of the diseased plants are flat on the ground, the heart leaves are exposed, the pith tissue at the rhizome is ulcerated, and the taupe viscous material flows out, and the diseased plant is inverted.
(2) Invasive type of vegetable basal: The pathogen invades from a certain basal wound to form a water-invasive lesion, and then gradually expands into a light gray-brown sticky slippery soft rot.
(3) Infestation type of the top of the blade: the pathogen invades from the wound at the top edge of the leaf, causing the whole leaf to rot.
If the above three types of symptoms are under dry conditions, the decayed diseased leaves will adhere to the healthy leaf ball after being exposed to sunlight and sunlight. If the whole plant is rotted when the humidity is high, the hydrogen sulfide will be emitted from the diseased area. Odor, which is a typical feature of soft rot.
Control methods: (1) Agricultural control: As far as possible, the field is selected as a field of wheat, rice, legumes and other field crops to grow cabbage, avoiding continuous cropping with eggplant, melon and other cruciferous vegetables. Early vacillation and tumbling to promote the decomposition of the diseased body. The low-lying plots were planted with sorghum live.
(2) Chemical control: 50 grams of cabbage seeds were mixed with 50 grams of "Fengling" and then sown. In the seedling stage, 100 to 150 grams of "Fengling" can be sprayed evenly with 50 kilograms of water to effectively control the soft rot of cabbage seedlings. To the cabbage rosette period, you can also use "Fengling" 250g to water 100kg, according to each plant 200-250ml liquid solution for one-hole irrigation or 72% agricultural streptomycin sulfate soluble powder 3000-4000 times liquid, or new Phytomycin 400 times solution, or 12% green milk copper 600 times solution, spray once every 7 to 10 days, speed spray 3 to 4 times, can effectively prevent cabbage soft rot.
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