What are the methods for controlling pests and diseases in cabbage cultivation

Cabbage is a cruciferous herbaceous plant and a vegetable we often eat. It is widely cultivated in all major provinces of China, has extremely high value and economic value, and can also excellently prevent cancer and heart disease. During cultivation, due to climate and human factors, cabbage will suffer from various pests and diseases, seriously affecting the yield and quality of cabbage. So how should these pests and diseases be dealt with? Let's take a look at the detailed content below.

1. Soft rot

Soft rot generally occurs in the late growth stage of cabbage, usually when the head is forming and folding. The pathogen invades from the stem base or leaf stalk of the cabbage. Water-soaked lesions begin to appear at the infected site. As the lesions expand, the entire root stem and leaf head eventually become diseased. In a dry environment, the head-forming leaves turn brown and dry, while in a humid environment, the leaf head rots and becomes soft, with a sour odor.

Control methods: Do preventive measures well, carry out reasonable crop rotation, reduce pathogens in the soil, and before sowing and planting, dress the seeds with chemicals to eliminate pathogens carried by the seeds. When one or two plants become diseased, they can be directly pulled out and taken out of the field, and the diseased holes should be disinfected well. If the disease occurs locally, copper hydroxide and daisen ammonium can be used for control. If the disease occurs over a large area, watermycin and streptomycin should be sprayed for control.

2. Black spot disease

Black spot disease mainly damages leaves. When the disease occurs, small water-soaked spots appear on the leaves. As the disease develops, these spots gradually become small brown round spots, and the edges of the lesions also have brown ring-like halos. When the disease is severe, the lesions show concentric rings, and finally become sunken brown spots. In a humid environment, the lesions will also be covered with brown mold-like substances, causing the leaves to wither and die.

Control methods: Likewise, treat the seeds with disinfection and sterilization. When the disease occurs, pesticides such as oxadixyl · mancozeb, thiophanate · iprodione, chlorothalonil, and benomyl can be sprayed for control. Pay attention to alternating the use of pesticides to avoid the disease developing resistance to them.

3. Blackleg disease

Blackleg disease can occur at the seedling stage and in adult plants, mainly damaging leaves and young stems, and is more severe at the seedling stage. When the disease occurs, round lesions appear, initially brown, and as the disease develops, they become grayish white, with many small black dots distributed on the lesions. When seedlings are diseased, the lesions spread downward along the stem, causing the surface layer of the stem to rot and fall off, exposing the xylem inside, and the seedlings are prone to death.

Control methods: Carry out reasonable crop rotation with cruciferous vegetables for more than 3 years, disinfect the seeds and soil before planting, increase the application of organic fertilizer to improve disease resistance, and promptly replant when diseased plants are found. When the disease occurs, pesticides such as thiophanate-methyl, thiophanate-methyl, and Dawang can be used for control.

4. Viral disease

Viral disease can harm both seedlings and adult plants. When seedlings are diseased, chlorotic spots appear on the leaves, the leaves gradually turn yellow, and eventually the entire leaf surface except the veins turns yellow. When adult plants are infected, the young leaves show uneven mottling, while the old leaves have dark brown necrotic spots, and the leaves shrink.

Control methods: Choose varieties with strong disease resistance for planting, carry out reasonable crop rotation, promptly remove diseased plants, and water and control temperature scientifically and reasonably to prevent the occurrence of viral disease. Pesticides such as virazole, ningnanmycin, and Bingdu Bike can be used for control.

5. Pests

There are many kinds of pests on cabbage. Common ones include cabbage caterpillars, noctuid moths, diamondback moths, and aphids. They all like to gather on the leaves of cabbage, suck the sap of the leaves, or gnaw on the leaf mesophyll tissue, causing the leaves to wither and die, affecting the plant's photosynthesis, reducing yield and quality, and in severe cases causing the plant to die.

Control methods: Do agricultural and chemical control measures well, clean the field, cultivate and weed in time, reduce pest sources, and also use trapping and killing methods for control. When pests break out, spray pesticides for control.

The above are the methods for controlling pests and diseases in cabbage cultivation. We hope they can help you. If you want to learn more about cabbage cultivation knowledge, please follow us.