The soft rot of celery, also known as "rotten gills," is a bacterial disease that occurs mainly on the base or stem of petiole. Germs can also harm cruciferous vegetables, potatoes, tomatoes, peppers, green onions, onions, carrots, and other vegetables. The hosts are very wide. First, the symptoms Usually start from the tender and juicy petiole base, the initial appearance of the first water immersion, the formation of light-brown spindle-shaped or irregular depression spots, followed by a wet rot, become black and odor, leaving only the epidermis. Second, infestation and spread The disease can occur within 4 °C ~ 36 °C, the optimum temperature is 27 °C ~ 30 °C. Bacteria that escape from the host alone survive in the soil for only about 15 days and are not resistant to dryness and sunlight. After the onset, it is easily invaded by spoilage bacteria and produces odor. The pathogens mainly live with the sick in the soil. It spreads through insects, rain, irrigation and various agricultural operations after the onset of the disease. The bacteria invade from the wound of celery. Because the host of the pathogen is very wide, it can infest and reproduce on various vegetables throughout the year, and it can cause damage to the celery cultivated in each season. The propagation and occurrence of soft rot of celery is closely related to the wounds and climatic conditions of soil and plants. The pathogens are easy to invade when there are wounds, and the wounds on the plants are more difficult to heal when the temperature is high and rain is heavy, and the disease is aggravated and easily spread. Third, control methods 1. Rotation. Celery soft rot spreads mainly through soils, etc. It is easy to accumulate a large number of germs in the soil of heavily populated land, and it is easy to become sick and aggravate the condition. Therefore, more than two years of rotation should be implemented. 2. Cultivation management. Because the soft rot pathogen first invades from the wound of the plant, the plant wound is one of the important factors of the disease. For this reason, in the process of planting, cultivating, weeding and other operations, the roots should be avoided or the plants should be wounded. Planting should not be too deep, soil should not be too high, so as to avoid the petiole embedded in the soil; timely drainage after the rain; found diseased plants in time to remove, and sprinkled lime and other disinfection; the onset of reduced or stopped watering to prevent flooding irrigation. 3. timely pest control. Insects can also cause wounds on plants, leading to morbidity. Therefore, pest control should be timely. 4. Chemical control. At the beginning of onset, spray 72% of agricultural streptomycin sulfate soluble neomycin or neomycin to 3000 to 4000 times solution or 14% solution of ammonia and copper to 350 times or 50% to starch copper WP to 500 to 600 times. Liquid, spray once every 7 to 10 days, continuous spray 3 to 5 times. Shaanxi Hongbaiyi Biotech Co., Ltd. , https://www.sxhongbaiyi.com