Experts pointed out that the celery soft rot is caused by the bacterial strain Carrinocarpus rot. It is mainly left over in the fields or compost during winter. When environmental conditions are suitable, the pathogens are transmitted by rainwater, irrigation water, and disease-transmitted insects such as yellow striped triceratops and cabbage caterpillars. They invade from the natural cracks, mechanical wounds, and insect wounds in the roots of the plants, and then enter the catheters to breed in a latent condition, causing the first time, Dips again. In addition to celery, the celery soft rot disease can harm carrots, cucumbers and cruciferous vegetables such as radish and Chinese cabbage and more than 20 kinds of vegetables and fruits.
Harmful symptoms
Celery soft rot mainly damages the base of petiole. When the base of the petiole became infected, water-soaked spots were formed, and after expansion, the lesions were brown, showing a spindle-shaped or irregularly shaped depression. During the drought, the disease stopped expanding. When the humidity in the field was high, the disease progressed rapidly. The diseased part was in a form of wet rot. The internal tissue was soft and rot. Only the epidermis remained, and a foul smell was emitted.
Prevention
Agricultural control and comprehensive prevention should be adopted as the main means, and better results can be achieved by selecting disease-resistant varieties, strengthening cultivation and management, and coordinating comprehensive control of chemical agents.
First, promote rotation. Try to avoid celery and cruciferous vegetables and other susceptible soft rot crops as much as possible, and re-infestation plots are encouraged to rotate with other vegetables for 2-3 years. The gargle arrangement has to make the land have a certain period of relaxation in order to improve the physical and chemical properties of the soil and to promote the decomposition of the diseased body and the death of pathogens.
Second, strengthen the cultivation and management. Take deep ditch sorghum cultivation, timely drainage after the rain, reduce the groundwater level, Fertilizer and water to do a small amount of ground water, reduce the chance of spread of pathogenic bacteria with water, apply enough base fertilizer, increase the full maturity of organic fertilizer. Field operations should prevent human mechanical damage from creating opportunities for the invasion of germs.
Third, clean up the pastoral. After the emergence of the diseased plant in the field, it should be immediately removed and treated with the liquid in a timely manner. Watering the diseased plant and its surrounding healthy plants can reduce the incidence. Immediately after harvest, the diseased plant debris was removed and brought out of the field to be buried or burned. The soil was deeply turned and the decomposition of the diseased body was accelerated.
Fourth, chemical control. At the beginning of the onset of spraying, spraying once every 7-10 days, continuous spraying 2-3 times. Pharmacy can choose 47% Garethon WP 600-800 times (125-165 grams per acre), 72.2% Precise 1000 times (100 grams per acre), amine WP 800 times solution (125 grams per acre), 30% DT wettable powder 600 times (165 grams per acre), 50% dexamethasone 800-1000 times (amount per acre 100-125 grams) etc. Severe disease fields can also be prevented by the use of liquid medicine.
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