Recently, farmers have consulted and there are dark brown patches or dark brown stripe stains in the fruits of tomatoes. After the author's field observation, it was tomato rot. Tomato rot is a physiological disease, which mainly damages the fruits. When it is severe, it cannot be eaten, which directly affects the yield and quality of tomatoes, causing losses to farmers. Symptoms Tomato rot is a major hazard to the fruit, which occurs during fruit enlargement to maturity. The fruit is affected. The appearance of the diseased fruit in the early stage is in good condition. The underlying subepidermal tissue is partially dark brown, with gradual grayish smudges from the pedicel to the umbilicus. When severe, it is cloud-like, and the color of the disease is deepened in later stages. Obviously, the discolored and necrotic vascular bundles can be seen in the anatomical fruits. In severe cases, the flesh is dark brown and corked. In the longitudinal cut, the stalks of the ginkgo stalks have a sinuous sinus, and some of the fruits form cavities. Causes The main cause of the disease was high soil moisture content, and the application of unfatting faeces, lack of light, and low temperature, led to abnormal plant metabolism, especially nitrogen fertilizer, chemical fertilizer imbalance in the proportion of the site is heavier. If the results of the period of low-temperature illumination, soil compaction, poor permeability, poor root system, easy to get rib rot. Control methods 1. Reasonable fertilization, addition of bio-organic fertilizer or humic acid organic fertilizer, regulate soil permeability, reduce the degree of soil consolidation; increase the application of potassium compound fertilizer or multi-element compound fertilizer, reduce the amount of nitrogen fertilizer to prevent tendon rot . Second, a reasonable watering, timely watering, the number should not be too much, do not flood irrigation. 3. Spraying boron-calcium foliar fertilizer or potassium dihydrogen phosphate or potassium nitrate foliar fertilizer to reduce the deficiency of boron, calcium, and potassium, and reduce the occurrence of tendon rot. Hespax Kids Gloves,Children'S Protective Gloves,Kids Safety Glove,Kids Protective Safety Gloves Jiangsu Hespax Security Co., Ltd , https://www.hespax.com