In August, the tomato in the greenhouse has entered the period of seedling management. The first thing a vegetable farmer should pay attention to is the occurrence of stem rot and root rot in common tomato diseases. Their symptoms are confusing in recognition, so errors often occur in medication. Symptoms of stem rot are close to the surface of the rhizomes in water-like contracture, stems become brown, wilting, dead, pull out the roots of the disease after the seedlings are good. This is because of the high temperature, high humidity, flooding irrigation caused by transplanting. This phenomenon generally occurs more severely in the flattened vegetable fields. Slightly drier areas with high ridge cultivation have a slightly lighter incidence. Although the symptoms of root rot and stem rot occurred in the roots of the seedlings, the root rot was found at the base of the underground roots, and the diseased seedlings were pulled out. The roots were black and rot and the roots turned yellow. The occurrence of root rot is related to seed-borne bacteria, surface fertilization and poor soil conditions. The land that is planted and used to supplement base fertilizer with fertilizers is seriously affected. In the prevention and treatment of drugs, stem rot must be soaked with 600-fold 600-fold Jinlei liquid for seedlings for 10 minutes before transplanting. After transplanting, it can be used 600 times Jin Lei, Ke Kang Ling and other liquids. Irrigation of plants. Prevention of root rot can be treated with 2.5% Shilo Suspension in 10 ml of 3 kg of seeds; after transplanting, it can be swished with 800 times solution or thiophanate-methyl 600 times solution. (Provincial Agricultural Plant Protection Institute)
