Cabbage is cultivated in many areas and is one of the most cultivated vegetables in China. Autumn and winter are good seasons for planting cabbage, but there are various pests and diseases on cabbage, which seriously affect the variety and yield of cabbage. How to prevent it? Let's take a look at it.
What are the common diseases during the cultivation of cabbage?
During the cultivation of Chinese cabbage, bacterial diseases are most likely to occur and are the most difficult to control. These diseases include soft rot, bacterial angular leaf spot and black rot. They can occur in various stages of cabbage growth and endanger their stalks. , leaves and roots.
1, soft rot
It can be found in the whole growth period of cabbage, which is divided into basic rot type, heart rot type and external rot type. After the soft rot has been obtained from cabbage, the disease usually starts from the base, the diseased part becomes soft and rot, and when it is severe, the root is festered and the mucus flows out. And emits a foul smell.
2, bacterial angular spot disease
The disease mainly occurs in the cabbage seedling stage to the core period, which damages the outer leaves, and irregular horny spots of different sizes appear. The foliar disease presents a brown oily stain. If the humidity is high, the cabbage leaf back lesions It will overflow white pus, and if the environment is dry, it will crack or perforate.
3, black rot
The disease can occur in all stages of Chinese cabbage, and the onset of adulthood, first from the marginal lesions, first black-brown lesions, sometimes along the veins, forming a large area of ​​yellow-brown spots, forming leaf stalks, or the middle ribs are light Brown, the leaves are tortuous, the plants are yellow, the outer leaves are dry and fall off, and the plants are down when severe.
Prevention
Many farmers know that copper preparations are very effective in controlling bacterial diseases, but for some leafy vegetables, especially cabbage, they are very sensitive to copper ions. If the copper preparations are used carelessly, there will be phytotoxicity such as burning leaves or spots. The phenomenon directly affects the yield and quality of cabbage, and the influence of inorganic copper agents is greater than that of organic copper agents. Therefore, the following points can be taken when preventing and controlling:
1. Reasonable close planting, drainage after rain, and maintaining soil permeability. Apply enough base fertilizer, increase the application of phosphorus and potassium fertilizer, and enhance the seedling potential. And timely remove the diseased residues in the field and reduce pathogens.
2. Seeds can be treated with the following agents: zhongshengmycin.
3, chemical control can be used: 2% spring serotonin, allicin, 47% spring Lei Wang copper, do not worry about the emergence of phytotoxicity.
The above is the introduction of the symptoms and control methods of bacterial diseases of cabbage, in order to ensure the quality and quality of maintenance, it is essential to prevent and treat these diseases. Let's take action!
For the wonderful pictures and popular comments on cabbage cultivation, you may be interested in the following recommended contents. Welcome to read.
Clinical&Analytical Instruments
Microplate Incubator,Analytical Instruments,Disposable Sampling Tube Kit,Clinical Chemistry Reagents
Guangdong Widinlsa International Co.Ltd , https://www.guangdongwidinlsa.com