The disease is mostly infested with the petiole or root of the rhizome, and is initially yellowish-brown, soft-smelling and has a foul odor. Soft rot sometimes starts from the edge of the outer leaf or the top of the leaf ball, and the root pith and leaf ball rot in severe cases. The germs spread through water or insects and invade the plants from wounds and cracks. The optimum temperature for disease occurrence is 25°C to 30°C.
Control methods: Prevent flooding and water accumulation in the raft, pay attention to ventilation and humidity, remove diseased plants in time, and properly control watering. At the beginning of the disease, 72% neophytin wettable powder or agricultural streptomycin sulfate wettable powder can be sprayed 4000 to 5000 times, or 50% DT wettable powder 500 times, or 47% Garrettner wettable powder 800 times. Solution, or 77%, can kill soluble micropowder 500 times. Generally every 7 to 10 days spray 1, even spray 2 to 3 times.
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