Cabbage seedling rot is a common problem and is usually caused by a variety of factors. The following are the causes that may lead to the rot of cabbage seedlings and the corresponding solutions:
Soft rot infection: Soft rot is a common disease in the growth process of cabbage, which can cause cabbage seedlings to rot. Seedlings infected with soft rot will have rotten leaf cores, water-stained petioles, and outer leaves will shrink and wither, showing translucency. The disease mainly occurs in warmer climates, and choy sum will continue to spread soft rot after being eaten by pests. To prevent and control soft rot, the following measures need to be taken: before sowing, soak the seeds with 200-400 times of 45% dysenammonium water, soak for about 15-20 minutes, then wash with water, dry and then sow seeds. At the same time, when diseased plants are found in the field, they should be uprooted in time and taken out of the field for destruction.
Soil calcium deficiency: Cabbage needs sufficient calcium during growth**, if the soil is deficient in calcium, it will lead to cabbage heartburn, which will be easily infected with bacteria, resulting in cabbage heart rot. To solve this problem, the following measures can be taken: during the growth of cabbage, calcium fertilizers, such as lime or gypsum, are added. At the same time, care should be taken to keep the soil moisture sufficient and avoid the soil being too dry or too wet.
Pest biting: After the pest eats the cabbage heart, it may infect the cabbage with rotten bacteria, resulting in the occurrence of rotten plants. To control pests, the following measures can be taken: choose varieties with high disease resistance, and remove pests that can cause cabbage wounds in time, such as cabbage worms, diamondback moths, etc. At the same time, when planting cabbage, it is necessary to avoid continuous cropping with tomatoes, cabbage and other crops, because these crops have a large demand for calcium during the growth period, which will reduce the calcium in the soil and cause the plant to rot.
Climatic factors: Long-term rainy weather or high temperature and rainy environment can easily cause the spread of germs. Therefore, when growing cabbage, one should pay attention to climate change and avoid growing cabbage in the hot and rainy season. If you encounter a long-term rainy weather or a hot and rainy environment, you should drain water, ventilate and reduce humidity in time.
Improper fertilization: Applying too much nitrogen fertilizer and lacking calcium** can lead to heartburn in cabbage. Therefore, it is necessary to pay attention to balancing nutrients when fertilizing, and apply nitrogen fertilizer and calcium fertilizer in moderation.
In conclusion, cabbage seedling rot is a complex problem that requires a comprehensive consideration of multiple factors. To solve this problem, a variety of measures need to be taken, including the selection of varieties with high disease resistance, reasonable fertilization, pest control, keeping the soil moisture sufficient, and timely removal of diseased plants. At the same time, when growing cabbage, you should also pay attention to the impact of factors such as climate change and soil conditions. If you encounter problems, you can seek help and advice from agricultural experts or agricultural cooperatives.
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