Symptoms mainly affect the leaves and loquat leaves. The lesions are irregular, light-transmitting, gray in the center, brown on the edges, and black dots on the upper part, which are the sub-capsules of the pathogen. Distributed in Jilin, Liaoning, Henan and other provinces.
The pathogen Mycosphaerella maydis (Pass.) Lindau said that the fungus is a fungus that belongs to the genus Ascomycota. The germ sac sac was born on both sides of the leaves, scattered or aggregated, buried at the beginning, with a round hole exposed outside the epidermis. The capsule is rectangular in shape, nearly rod-shaped to capsule shape, and has a size of 35-557.5-8.5 (um). Ascospores are oblong, colorless, with a diaphragm, slightly contracted at the diaphragm, with 1-2 oil droplets in the cell, the size of 14-163.5-4 (um). In addition to damaging corn, it can also infect alabia and Sudan grass.
Transmission routes and pathogenic conditions The pathogens overwinter on sick and sick bodies and form ascospores in the spring of the following year for initial infection. Cold and wet conditions are susceptible to disease.
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