Symptomatic features: Onset of seedling stage, round dark green spot on the cotyledon, water-stained, with a reddish-brown central gradient, and the stalks are dead and overwhelmed. When the true leaf humidity is high, the soft rot is easily broken and the fruits and melons are destroyed. The worms are often infected from the umbilicus, and the lesions are sunken, water stained, and dark green, and later spread to the whole fruit, resulting in soft rot. Incidence conditions: The pathogen is high in temperature and high humidity in the temperature range of 25-30°C. When the rain is long and the amount of rainfall is large, the incidence is heavy. Prevention: (1) 5-7 years of rotation with grass crops. (2) Reasonable fertilization, increasing phosphorus and potassium fertilizers, spraying Fuer 655 liquid surface fertilizer. (3) At the beginning of the disease, the central diseased plant was pulled out or buried. At the same time with 72.2% Preclosure 600 times liquid, or 56% by water to disperse the micro-particles 600 times, or 40% 200% aluminum alfa 200-300 times, 64% anti-virus M8600 spray. Tuna Loin,Frozen Tuna Loin,Fresh Tuna Loin,Yellowfin Tuna Loin ZHEJIANG RETRONX FOODSTUFF INDUSTRY CO.,LTD , https://www.retronxfoods.com