Prevention and treatment of narcissus red spot on daffodils

Symptoms: Leaves, pedicels, sepals, and bulbs can all infect the disease. Irregular reddish-brown spots appeared on the leaves at the early stage of the disease, and later lesions expanded to purple spots with oval or spindle-shaped depressions. Pedicel also occurs in small red-brown spots. After rapid auburn strips, the peduncles are bent to the side of the lesion. A round or elliptic lesion forms when the bulb is infected, and a granular dark brown dot mold layer appears when the environment is wet.

Pathogen and pathogenesis: The pathogen is wintering of conidiospores on the diseased body with conidiophores. If the diseased ball is planted, it becomes the source of the second year's dip. The conidia of the germs spread by rain and rain.

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