In recent rice paddy fields, bacterial root rot occurred in rice. The disease has been reported from the stage of tillering to booting in rice. The main feature is the occurrence of dead heart and dead plants, accompanied by foul odors, which can easily be mistaken for damage. Symptoms: The disease is a bacterial disease that mainly affects the root and root bases of rice. It usually begins at the tillering stage of rice. The diseased plant first produces a water-stained elliptical or long-spindle disease on the leaf sheath near the base of the proximal soil stem. The spot gradually expands to an irregularly shaped large lesion with a brown edge and a middle white color. Severe diseased plants, leafy green leaves, and then yellow, resemble aphids that cause dead heart seedlings. At the onset of jointing, the leaves turned yellow from bottom to top, near the surface of the leaf sheath brown, gray stripes in the middle, discoloration of the root section with foul odor. At the time of booting and heading, the diseased plants were dehydrated and withered first, and then dry booties, white panicles, or semi-white panicles were formed. There was a short and less lateral root discoloration in the root section, which had a bad odor. The unique symptom is that the root of the diseased plant becomes brown or dark brown rot, easily unplugged, and has an unpleasant odor. Incidence conditions: The pathogenic factors of bacterial base rot in rice have the following aspects: variety, seedling quality, fertilizer and water management, and climatic conditions. Fertilizer: The terrain is low, the soil is heavy, the drainage is bad, and the poorly-breathable fields are heavy. The shallow water is used for irrigation and the field can reduce the incidence. Fertilizer types and quantities are also closely related. Many nitrogen fertilizers, late application, young and tender are susceptible to disease. It is effective to increase organic fertilizer and potash fertilizer. Climatic factors: high temperature and humidity conducive to disease. Control: Mainly used for sterilization of pesticides, and increased phosphorus and potassium fertilizers to increase plant disease resistance. The pharmaceutical agent can be used as a bactericidal agent such as 72% agricultural streptomycin wettable powder 3000 times, 77% copper hydroxide wettable powder 400 times liquid, 600 times liquid of neomycin and so on. Prevention 2-3 times. L-Phenylalanine,L Phenylalanine Powder,L Phenylalanine Cas 63-91-2,Food Additive Nutrition Supplement CHANGZHOU GUANGHUI FOOD INGREDIENTS CO.,LTD , https://www.gsweetfood.com