How to prevent and control Chinese cabbage soft rot? These methods are very practical

Chinese cabbage soft rot, also called "rotten knot," mostly begins during the head-forming stage. In the early stage of the disease, the outer leaves appear wilted and drooping under sunlight, but they still recover in the morning and evening. As the disease progresses, these diseased leaves no longer recover, exposing the leaf head. The lesions are water-soaked, and the diseased tissue turns brown, rots, and becomes slimy, with a foul odor.

Prevention and control methods

1. Practice crop rotation: where conditions permit, paddy-upland rotation is preferable. Do not apply diseased organic fertilizer. Plow deeply and sun-bleach the soil to control the source of the pathogen.

2. Practice high-ridge cultivation, which helps with drainage and waterlogging prevention and can reduce the occurrence of the disease.

3. Irrigate and fertilize rationally: apply sufficient base fertilizer, topdress in a timely manner, so that the seedlings grow vigorously and disease resistance is enhanced.

4. Remove diseased plants promptly: removing diseased plants reduces the source of inoculum and prevents the pathogen from spreading. Especially before irrigation, check and handle them promptly. Sprinkle lime into the holes for sterilization.

5. Pay attention to pest control: avoid causing wounds, so as to prevent the pathogen from invading.

6. Choose disease-resistant varieties: generally, green-stem varieties and first-generation hybrids have stronger disease resistance.

7. Chemical control: the following pesticides may be used: agricultural streptomycin, one small packet diluted in 100 kg of water, or 70% Dexon at 600 times for root drenching; 20% Longkejun at 600 times or 47% Jiaruinong at 800 times may also be used, once every 7 days, sprayed 2-3 times in succession.