Vegetable pods to prevent root canal disease
Crucify disease is easy to get with cruciferous vegetables. The young seedlings of the sick vegetables, when they encounter the sun, the leaves will start to grow numb. Pulling out a plant will often lead to the discovery of a string of tumors by the head of the roots. The severe roots are completely rotted.
The main manifestation of clubroot disease is the pale leaf color of the diseased plant, withering and drooping, and the swelling of the roots as a tumor. The root canal disease cannot be cured once it reaches a later stage. The occurrence of clubroot disease is caused by the presence of pathogenic bacteria in the soil, especially in continuous cropping fields where rape and cabbage vegetables are planted year after year. There are a large number of dormant sporangia of Plasmodiophora brassicae, which is the main condition for clubroot disease. There are also four factors: First, the soil moisture is high, and low-lying plots of water and land where water is changed to drought are more susceptible to disease; second, the soil is acidic, the optimum pH is 6.2, and the incidence is less than pH 7.2; the third is the lack of calcium in the soil. , The lack of calcium oxide; Fourth, the temperature is suitable, 9 ~ 30 °C can be the disease, the optimum temperature is 23 °C.
Prevention and control measures: The first is to carry out more than three years of rotation, the better the dry and wet rotation. In areas with severe clubroot disease, it is best not to use glyphosate herbicides for weed control. The seedbeds were treated with 50% of Dixon 400 times. The second is to adjust the pH of the soil. The mu is applied to the soil surface uniformly with slaked lime 100-150 kilograms, and fully mixed in the soil through site preparation. The third is to strengthen the cultivation and management, adhere to the deep trench high compartment, timely rule out the field water. The fourth is the medicine irrigation nest, mu using "Jin Lei Duomier" 500 times liquid, 1% lime liquid or 1% lime liquid + 75% chlorothalonil WP 1000 times liquid, filling 2~3 days after transplanting , Irrigation once in 10 days. The fifth is to remove and destroy diseased plants in a timely manner. The diseased plants were found, removed in a timely manner, and fired at high temperatures or dried and then uniformly burned. The diseased plants must not be left in the fields or thrown in other areas to prevent the spread of larger areas of the bacteria.
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