How to prevent and control celery root knot nematode disease? What s the best way to do it?

Diseased plants should be removed in time to avoid returning to the field. With the help of greenhouse and climatic conditions, land ploughing and the use of greenhouse drugs, in the fertilization stage, it is necessary to mix fertilizer with compound fertilizer before sprinkling, or water the roots with an appropriate concentration of fertilizer after the emergence of seedlings, using the parasitic and growth-inhibiting effect of lilac fungus on nematodes, which can kill the eggs and reduce the possibility of vegetable pests occurring in this season.

The severely diseased plots can be rotated for 3 to 4 years, which can be rotated with vegetables such as onions, garlic and leeks, and with grasses such as wheat and millet. Use the plot of free insect for seedlings.

Common diseases of celery include soft rot, soft rot, virus disease, early blight, sclerotinia and so on. Try to choose varieties with strong disease resistance when planting in the early stage; Soak the seeds in warm water at 48 degrees for half an hour before sowing; In the later stage, the diseased body is found to be removed in time, and attention is paid to the circulation of air; Prophylaxis can be used with drug sprays and **. Common insect pests mainly include aphids, spotted submarine flies, vegetable moths, jumping beetles, etc., which can be killed with drug sprays such as imidacloprid, aphid mite, and spotted latent net.

Disease control. Common diseases: soft rot, soft rot, virus disease, early blight of Yanmin pants, sclerotinia disease.

Soft rot: This disease usually occurs during the transplantation of celery in its infancy, or during the growth period after transplantation. When the disease is severe, it causes celery to rot and emit a pungent foul smell.

Heart rot: This disease can overwinter in the soil, and will spread with the soil to the plants the next time it is planted. It is easy to cause this disease when the temperature reaches more than 36 degrees Celsius and below 12 degrees Celsius.

The best temperature for celery is between 27 degrees and 30 degrees. At the same time, germs can also be transmitted through watering, insects, etc.

Viral disease: This disease mainly erodes the leaves of celery. Originally it also occurred first by the leaves of celery. This disease is mainly caused by too high and too low temperatures. Between 20 and 25 degrees, combined with the rain and humidity of the air, it is easy to trigger the disease.

Early blight: It is the same disease as spotted disease. It can occur both at the seedling stage and after adulthood. The main cause of this disease is also due to excessive temperature and humidity.

Sclerotinia sclerotinia disease: Celery can get sick throughout the growing season, and the main cause of this disease is also caused by excessive temperature and humidity.

Prevention and control methods: 1Try to choose varieties with strong disease resistance before planting.

2.Before sowing, soak the seeds in warm water at 48 degrees for about half an hour, which can effectively prevent and control the diseases brought by the seeds before sowing.

3. Reasonable fertilization, and timely removal of diseased bodies to prevent spread. Pay attention to the circulation of air and avoid moisture.

4 Can be prevented with drug sprays and**.

Pest control. Common insect pests: aphids, spotted divers, vegetable moths, jumping beetles, etc.

Control measures: imidacloprid, aphid mite, spotted latent and other drug sprays can be used to kill.

Summary. To kill nematodes, it is known that the more effective biological agents include lavender purple, which can last for one season after irrigating the roots, and prevent and control celery roots from the infestation of insect eggs within the growth range, and have a certain prevention and control effect on root rot.

Killing nematodes, at present, it is known that the more effective biological agents include lavender purple spora fungus, which can last for one season after irrigating the roots, to prevent and control the root system of celery root system to grow and grow to avoid the infestation of insect eggs, and has a certain control effect on root rot.

Thiazophosphine and avermectin B can also be used to kill nematodes in the cultivation of agricultural bend forests, but it is not recommended in the cultivation of celery, because these two insecticides can develop upwards through the root system and extend to the stems and leaves. Celery is a crop with stems and leaves as the edible part, and from the perspective of environmental protection and safety, it is better to prevent and control celery nematode disease by applying microbial fertilizer.

How to do disease prevention and management of planting celery 1. Before planting, the underground nematodes are killed with the help of high temperature and mulch film in summer, or rainy daylight. 2. After uprooting the diseased and residual plants, use lime water to flush the soil in time to control insects and diseases, and supplement the nutrition of Jingxuxin. 3. Celery planting can reduce the incidence of insect pests.

4. Pay attention to the application of water fertilizer and foliar fertilizer in the process of celery planting, and cultivate strong seedlings can reduce the impact of nematode occurrence on yield and quality.