![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
The product introduction period of Chinese cabbage is around the National Day, but its seedling period happens to be in the late summer and early autumn. The higher temperature often affects and inhibits the growth of Chinese cabbage seedlings, and often leads to severe virus disease leading to reduced production or even no harvest. Early autumn cabbage diseases mainly include soft rot and downy mildew. It is recommended that the vegetable farmers should prevent it as soon as possible. The specific methods are as follows:
Soft rot: The disease starts from the heart of the cabbage, and the affected part is infiltrated with a translucent brown color, which then becomes sticky and soft and rotted, and finally the whole plant is dead. Some occur from the base of the stem or the thick petiole, causing the whole plant to wilting. Soft rot occurs mostly in the late stage of Chinese cabbage. In the early stage, the outer leaves wilted at noon. In severe cases, the base of the stem rotted, and the top of the heart rotted, causing severe reduction of cabbage.
Soft rot fungi mainly overwinter in diseased plants and soils. Through irrigation, rainwater and insects, bacteria invade from plant wounds, especially poorly drained plots, flooded water, soil stickiness, shovel roots, mantle damage, etc. , easy to induce disease. Since the autumn, the weather is cool, the rain is heavy, the heat is cold and hot, and the temperature difference between day and night is very high, which is very beneficial to its disease. If it is not timely prevented, it will easily cause large-scale production reduction or no harvest. The control measures are as follows:
First, the cultivation of large ridges or sorghum makes it difficult for rainwater and irrigation to soak into the root and neck of cabbage, and it is easy to drain, reducing the chance of transmission and invasion of soft rot in the soil.
The second is to timely control pests such as jumping armor and mantle.
The third is chemical control, the initial stage of the disease can be used with 20% thiabend copper suspension agent 75 ~ 100 grams, or 42% trichloroisocyanuric acid wettable powder 70 ~ 100 grams spray. The seriously ill plants should be removed in time, and a layer of quicklime should be sprayed on the root soil to avoid water transmission when watering.
Downy mildew: mainly harms cotyledons, true leaves, flowers and seed pods. First, there are water-stained pale green spots on the leaves, which gradually turn yellowish brown for two or three days. When the humidity is high, the white spots of the diseased leaves grow. In the peak period of the disease, when the disease occurs, several lesions will connect with each other to form irregular yellow leaf spots, causing the leaves to die.
Prevention and treatment methods: In the early stage of the disease, it is possible to use spray treatment with tebuconazole or propiconazole.
Total 1 | <First <Prev 1 Next> Last> |
share to:
Carbide Die,Carbide Swaging Dies,Tungsten Die,Carbide Punch
Chongqing Henghui Precision Mold Co., Ltd , https://www.citool.com