Control methods of diseases and insect pests in cabbage planting

Cabbage is a cruciferous herb, which is also a vegetable that we often eat. It is widely cultivated in major provinces of our country. It has high cause and economic value, and it can also prevent cancer and heart disease. When planting, because of climate and human factors, cabbage will suffer from a variety of diseases and insect pests, seriously affecting the yield and quality of cabbage, so how to deal with these diseases and insect pests? Let's take a look at the details.

1. Soft rot

Soft rot generally occurs in the late growth stage of cabbage and occurs during heading and pericardium. The pathogen invades from the stem base or petiole of cabbage, and water-stained spots begin to appear at the infected site, which eventually leads to the disease of the whole rhizome and leaf ball. In dry environment, heading leaves become brown and dry, while in wet environment, leaf balls rot and soften, with a sour smell.

Prevention and control methods: to do a good job of preventive measures, reasonable crop rotation, reduce soil bacteria, seed dressing before sowing and planting, eliminate the germs carried by the seeds. When one or two strains of disease occur, they can be pulled out and taken out of the field directly, and the disease points can be disinfected. If it is a local disease, copper hydroxide and substitute deep ammonium can be used to prevent and cure it. If it is a large area disease, it should be sprayed with hydramycin and streptomycin.

2. Black spot

Black spot mainly harms the leaves, and there are water-stained spots on the leaves at the onset of the disease. with the development of the disease, these spots gradually turn into small brown spots, and there are brown ring halos on the edge of the disease spots. When the disease is serious, the disease spots show concentric wheel lines, and finally become sunken brown spots. In a humid environment, the disease spots will also grow brown mildew, causing the leaves to wither and die.

Prevention and control methods: similarly, after disinfection and sterilization, the seeds can be sprayed with evil frost, mancozeb, benzoin, chlorothalonil, carbendazim, etc., and pay attention to the alternate use of chemicals to avoid drug resistance to the disease.

3. Black shank disease

Black shank disease can occur in the seedling stage and adult plants, mainly harming leaves and young stems, the disease is more serious in the seedling stage, the disease appears round spot, the beginning is brown, with the development of the disease, it becomes grayish white, and there are a lot of black spots on the spot. In the seedling disease, the disease spot will spread down with the stem, take away the stem surface rot and fall off, exposing the xylem inside, the seedlings are easy to die.

Control methods: reasonable rotation with fertilizer cruciferous vegetables for more than 3 years, disinfect seeds and soil before planting, increase organic fertilizer, improve disease resistance, and replenish diseased plants in time. Methyl topiramate, methyl topiramate, king and other chemicals can be used to control the disease.

4. Virus disease

Virus disease can not only harm seedlings, but also harm adult plants, the leaves appear chlorotic spots, the leaves begin to yellowing gradually, and finally the whole leaf surface except veins, the whole leaf yellowing. When the adult plant is infected, the young leaves appear uneven mottled, while the old leaves are preferably black-brown necrotic spots, and the leaves are wrinkled.

Prevention and control methods: select varieties with strong disease resistance, reasonable rotation, timely removal of diseased plants, scientific and reasonable watering and temperature control, prevention and control of virus diseases, which can be controlled by virus Ling, Ningnanmycin and virus Bike.

5. Insect pests

There are many kinds of pests in cabbage, including cabbage moth, night moth, diamondback moth and aphids. They all like to gather in the leaves of cabbage, suck the sap of the leaves or eat the mesophyll tissue, causing the leaves to wither and die, affecting plant photosynthesis, reducing yield and quality, and in serious cases, until the plant dies.

Prevention and control methods: to do a good job of agricultural and chemical control measures, clear the field, timely ploughing and weeding, reduce the source of insects, can also use trapping methods for control, in the outbreak of insect pests, spraying chemical control.

The above are the prevention and control methods of cabbage planting diseases and insect pests, hope to help you, want to know more cabbage planting knowledge, please pay attention to us.