The main symptoms of Botrytis cinerea are: The disease begins with invasive female flowers and begins to infiltrate in the flower peduncle. It gradually grows brownish brown mold, causing the flowers to become soft, atrophy and decay, and gradually The expansion of the young melons, the melon disease department first yellow, later produced white mold and gradually turned pale gray, resulting in the disease melon growth stopped, softened, decayed and atrophy, and finally rot off. The leaves were infected and the lesions began to be water-stained and later changed to irregular, light-brown lesions with sharp edges.
Control methods:
1. Smoke method: Use 20% fast-kerosene smoke agent, 200-250 grams per acre per dose, or use 50% agrigenizer, 250 grams per acre per dose. Smoke for 3-4 hours. Smoke can be smoked in the evening and the next morning, open doors and windows for ventilation;
2. Dust method: Spray 10% quick-killer dust agent, or 5% chlorothalonil dust agent, or 10% chlorpyrifos dust agent in the evening, spray 1 kg per acre each time, spraying once every 7-10 days. , Borderlands or alternately sprayed 2-3 times. The above-mentioned fungicides have better preventive effects than therapeutic effects. After the onset of drug use, the amount of the drug should be appropriately increased.
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