Consultation: How to prevent tomato ulcer disease? Answer: Canker disease is a kind of bacterial disease. Germs can overwinter on the inside or outside of the seed or on the residue. They can be invaded by various wounds of the stem, leaf, pedicel or young root of the plant, and can also be directly from the epidermis of young fruit. Intrusion. The field mainly spreads by irrigation and agricultural operations such as pruning. The appropriate temperature for the onset of the disease is 25°C to 27°C. General plant wounds are numerous, diseases are prevalent, greenhouse humidity is high, dew condensation takes a long time, and the incidence is heavy. Nitrogen fertilizer is used excessively, flooding water is flooded, and the disease spreads rapidly. Control measures: 1. Seed disinfection. Seedlings were soaked in warm water at 55°C for 30 minutes before sowing, and then sowed after cooling and germination; or soaked in 200 mg/L agricultural streptomycin sulfate for two hours, washed with water and then germinated. 2. Strengthen field cultivation management. Appropriate fertilization, avoid flood irrigation, minimize wounds during agricultural operations, timely removal of diseased plants found in the field, bring out the destruction of the field, and treatment of sick strains with lime. 3. Chemical control. At the beginning of the disease, all fields were sprayed with 72% sulfuric acid streptomycin 4000 times, or 14% colubridium ammonia solution 300 times, or 77% copper hydroxide wettable powder 500 times, or 50% copper chloride fertilizer Wet powder 500 times, etc. for prevention and treatment. Apply once every 7-10 days for 3 to 4 consecutive times. According to some farmers' friends, the effect of the above-mentioned pesticides is not satisfactory. It is recommended that 33.5% quinoline copper suspensions be used 800 times as well as 72% agricultural high-efficiency streptomycins as well as 3000 times, or 32.5% phenylpyrazine. Ester 1500 times mixed with 77% copper hydroxide 700 times the water, or pruning before and after each spray 1 33.5% quinoline copper suspension 800 times. Marshmallow Candy,Marshmallow Gummies,Easter Marshmallow Candy,Cotton Candy Marshmallow Montreal Shantou Food Co., Ltd , https://www.montrealsnack.com