The causes of the death of the latest celery seedlings and its control methods

The temperature is higher in summer and the temperature is higher in summer, so celery is easy to die in cultivation, which not only has a great impact on the growth and yield of celery, but also brings great losses to vegetable farmers. So why did celery die? How to prevent and cure dead celery seedlings? Let's get to know it with the editor.

First, the cause of dead celery seedlings

Celery dead seedlings mostly occurred in summer and autumn Rain Water season, coupled with the serious continuous cropping phenomenon, resulting in a variety of diseases, resulting in celery dead seedlings diseases include rot, Sclerotinia sclerotiorum, black rot, quenching disease, bacterial blight. Their symptoms are different, the petiole of soft rot disease begins to appear water-immersed spot; the damaged part of Sclerotinia sclerotiorum is brown water-immersed, and when the humidity is high, it shows soft rot; black rot occurs when the disease part blackens and rotts, and many small black spots grow on it; when the sudden fall disease is serious, it leads to lodging and can not stand upright; after a week of development, the disease spot constricts, the root dries and wilts, until it dies.

II. Prevention and control methods

1. Rational rotation

Rotation can reduce the base number of diseases and insect pests, reduce the incidence of disease, and carry out rotation for more than two years.

2. Disinfection of seedbed

The use of old seedbed seedlings, must be carried out soil disinfection, can be disinfected with formalin or carbendazim or thiophanate disinfection.

3. Seed treatment

Leave seeds in disease-free areas or disease-free plants, soak the seeds in salt water before sowing, then rinse them with clean water, and sow them in dry air, which can effectively control Sclerotinia sclerotiorum. Or use Dysen zinc wettable powder to mix seeds, the dosage is 0.3% of the seed weight, rinse with water and accelerate germination and sow, which can prevent blight and sudden fall.

4. Seedbed management

When sowing, do not be too dense, after emergence and time seedlings, the humidity of the seedling bed is high after rain, should be timely drainage, and sprinkle plant ash on the seedbed many times, the diseased plants should be pulled out in time, taken to the land to burn or buried.

5. Field management

When ploughing and loosening the soil, we should be careful not to hurt the roots, reduce mechanical damage, and should not be too high when cultivating the soil, so as not to bury the petiole into the soil, drain water in time after rain, and reduce the number of watering during the attack. The diseased plants were found to be overlords in time and taken out of the field, and then disinfected with lime.

6. Chemical propagation

Chlorobromoisocyanuric acid can be used when soft rot occurs, once every 7-10 days, spraying 2-3 times. In the occurrence of black rot, Sclerotinia sclerotiorum, bacterial blight and quenching disease, you can use 50% carbendazim 600 times solution, 50% carbendazim 600 times solution, 50% carbendazim 500 times solution, once every 7-10 days, twice in a row.

The above is the introduction of the causes and control methods of dead celery seedlings. I hope I can help you. If you want to know more about it, please follow us.