Ginger spot disease
(pathogen name) PhyllostictazingiberiHori
(host crop) ginger, cardamom.
(disease diagnosis) mainly damaged leaves. The disease spot on the leaf is fusiform or oblong, 3-5 mm long, the edge is brown, the center is yellow-white and thin, easy to rupture or perforation, and many small black spots are produced on the surface of the disease spot in the later stage. When the disease is serious, the whole leaf is dotted with disease spots. The pathogen is ginger leaf mildew. The conidium of the pathogen is spherical to oblate, dark brown. Conidia unicellular, ellipsoid.
The pathogen overwintered in the soil with the remains of mycelium and conidia. In the following year, the overwintering bacteria produced conidia and spread to the ginger leaves, and the infection caused the disease in the field. After the onset of the disease, the conidia produced by the disease department were re-infected by wind and rain. The disease re-infects frequently, and the disease develops rapidly under suitable conditions. The pathogen likes warm and humid conditions, warm and humid, gloomy between plants, high humidity in the field, and easy to occur. The occurrence and development of the disease are closely related to the number of rainfall and the amount of rainfall.
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Simple cultivation techniques of "Zheng onion No. 1" in spring
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Laiwu turmeric
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