(1) symptoms. Harm the leaves and petioles. The leaves and leafballs exhibit wet-like ulceration and meshy hyphae. The petiole near the ground has brown necrotic spots. When wet, it spills brown juice. When dry, it turns brown and has brown spots. Sometimes it has brown sclerotia.
(2) Transmission routes and conditions. Fungal diseases, diseased plants, seeds, and soil are borne by pathogens, and pathogens are spread by rainwater, irrigation water, and field operations. At temperatures above 20°C, fields with high humidity or standing water are susceptible to disease.
(3) Control measures. Select resistant varieties, use 10% saline to select species, strengthen field management, prevent high humidity and nitrogen, spray 50% Suo Keling wettable powder 1500 times, or 10% Sclerotinia wettable powder 500 times.
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