How to control cabbage soft rot?

How to prevent and cure the soft rot of cabbage? The pathogen of soft rot of Chinese cabbage is short rod-shaped bacteria of Owen. In the environment of 20 degrees and high humidity, the pathogen formed colonies with the host plant rhizosphere soil as the center for a long time. In rainy days, with the help of soil splashing, the wounds in the lower leaves and petioles of cabbage and the food marks of insect pests invade, and when they encounter parasitic plants, they propagate rapidly. Next, the editor will talk about the harm and control measures of soft rot of Chinese cabbage, hoping to be helpful to everyone.

Symptoms of soft rot of Chinese cabbage

The symptoms of the disease are slightly different due to different host crops, different parts of plants and different environmental conditions. But the site of the disease starts from the injury □. When the soft and succulent tissue comes on, it begins to show water-immersed translucency, the posterior epidermis sinks and turns brown, and the diseased tissue immediately decays, showing a sticky, soft rot, and gives off a stench. When the more solid and less juicy tissue is injured, it is also water-immersed at first and gradually rotten, but finally the tissue of the disease shrinks and becomes dry-rotten.

The disease of Chinese cabbage in the field began to occur in the early stage of the pericardium, and the disease occurred at the base of the outer leaves, showing a flooded yellowish spot, gradually enlarged to light yellow or yellowish brown and rotted, and odor occurred. Two days after the appearance of the disease spot, the vascular bundles of the disease turned yellow to brown, and quickly spread to the stem and root through the vascular bundles, resulting in other leaves or the whole plant disease. At the beginning of the disease, my leaves wilted at noon and recovered sooner or later. With the development of the disease, the outer lobe of the disease no longer recovered and collapsed to the ground, exposing the leaf ball, which is called detachment. At this time, as the base has rotted, the leaf ball is easy to kick off, and the heart at the base of the petiole and the rhizome is full of grayish-brown sticky matter, which is called rotten pimple. The internal decay of the leaf ball is called a sauce bucket. In some diseased plants, the outer leaf edge is scorched or the tip of the heart leaf is rotten. Rotten diseased leaves, when the weather turns warm and dry. Can quickly lose water in the shape of tissue paper. When the disease occurs in the cellar period, it often occurs from the injury of the outer leaf.

Control methods of soft rot of Chinese cabbage

(1) to change the planting pattern from the traditional flat planting to ridging planting. The specific method is: ridging the cultivated land according to the row spacing required by cabbage, the general ridge height is 8-10 cm, and the furrow between the ridge and the ridge is spread with a layer of wheat bran or chopped wheat straw mixed with phoxim or dichlorvos pesticides. It can not only prevent insects, but also prevent grass from coming out of the ditch. In the future, when watering cabbage, the amount of water should be flat with water and ditch.

(2) High tube varieties or green hemp leaves are generally selected for disease-resistant varieties, such as Beijing Xin 3, Jincai 3, Taiyuan Erqing, etc. If you have to plant spherical varieties, such as Fengkang 80, you can postpone the sowing date and reseed 2-4 days after the Beginning of Autumn, or raise seedlings and transplant. In this way, Chinese cabbage can avoid the period of high temperature and humidity and greatly reduce the soft rot of Chinese cabbage caused by high temperature and humidity.

(3) choose the right stubble to avoid repeated stubble. Generally speaking, you should choose the plot where onions, garlic or kidney beans are planted, and it is better if it is wheat stubble. In this way, the infection of soft rot bacteria can be avoided.

(4) after timely medication to prevent cabbage colonization, spray prevention with 72% agricultural streptomycin 3000-4000 times liquid or 20% Jingangmycin water solvent, 25 grams of each bag with 50 kilograms of water. In addition to spraying in the whole field, we should also focus on spraying the liquid at the base of the root of Chinese cabbage, about 100 grams per tree, so that the liquid can infiltrate into the soil of the root of cabbage. Spray once in 7-10 days, 2-3 times in a row. If sporadic soft rot plants are found, they should be pulled out and taken out of the field immediately, spread quicklime in the pit of the diseased plants, and continue to be sprayed with the above-mentioned agents.

The prevention and control methods of cabbage disease are introduced here. Cabbage soft rot has a great impact on the growth of cabbage in the later stage, so we must do a good job in the prevention and control of cabbage soft rot in time.