The latest symptoms and control of root swelling disease of Chinese cabbage

Cabbage is widely planted, its taste is sweet and its price is affordable. But despite its cheapness, there are many cabbage planting bases in our country. However, when growing Chinese cabbage, there will be many diseases and insect pests, including root swelling disease, which will lead to dwarfing and yellow leaves of Chinese cabbage, serious root deformation, and fungal residue for more than ten years. So what are the symptoms of root swelling? How to prevent and cure it? Let's have a look!

1. Characteristics of the disease

Root swelling disease is a fungal disease, which can not be observed normally at the initial stage of the disease. Fungi will invade the roots of Chinese cabbage, resulting in tumors of various sizes. When the disease occurs for about half a month, the plants on the ground will gradually wither, grow very slowly, and stop growing directly in the later stage. Then the leaves gradually turn yellow, showing symptoms of water shortage, which is the easiest time to mislead vegetable farmers, and many people think it is caused by water shortage. In fact, it is due to the root tumor is too large, resulting in normal water absorption, resulting in the symptoms of water shortage.

2. How to diagnose

There are only two reasons for the occurrence of tumor in the root of Chinese cabbage. The first is caused by root-knot nematode eating the root. Root-knot nematode will eat in the root of Chinese cabbage and make the root gradually swollen. Pull out the diseased plant and find that there is no root-knot nematode, you can use microscopic examination, if there are 5-6 edge-type bacteria, then the high probability is the brassica rhizomatous bacteria that cause root swelling disease. Brassica root swelling fungus is mainly latent in the soil, and then spread through diseased plants, water and other media, resulting in the occurrence of root swelling disease in a large area of Chinese cabbage.

3. The regularity of the disease

The incidence of root swelling disease in diseases and insect pests is relatively small, but according to the experimental investigation, there are cases of root swelling disease everywhere in recent years, and it is still on the rise. Brassica root swelling fungus can survive in the soil for a long time, as long as it is growing cruciferous vegetables, it will be irregularly sick, but also rely on the flow of water and fertilizer in the soil and a variety of insects to spread. Especially in rainy weather and humid fields, the disease is more serious, and the incidence of root swelling disease is high in spring every year.

4. Prevention and control methods

First of all, when we select seeds, we need to select varieties with strong disease resistance, and then do a good job of disinfection and sterilization of seeds, which can be mixed with double powder. Continuous cropping can not be carried out, the previous crops in the soil are cruciferous, and planting should be avoided as far as possible, and rotation can plant some melons and fruits. To disinfect the planting plots, you can use agents such as Fushuaide suspension to mix them into the soil before sowing. Do a good job of prevention, regular disinfection and strengthen the management of the vegetable garden.

The above is about the introduction of root swelling disease, root swelling disease may not be very familiar with, because its incidence is less. However, the incidence of root swelling disease has gradually increased in recent years, and the harm degree of root swelling disease can be said to be among the top several diseases. The editor also hopes that everyone can pay attention to it, so I specifically introduced the root swelling disease. That's all for today's article. This article is for reference only. I hope it will be helpful to you.