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Pathogen and Pathogenesis: Fungi. It is Cercospora structiua Rav. The disease began in mid- and late-May, and peaked in August. The disease stopped basically after November. Extensive management, rainy weather, poor air and light transmission, cold weather in spring, hot summer, insufficient fertilizer and water, and diseases easily occur.
Control measures: (1) The diseased leaves were found to be cleared in time. (2) In the onset season, spray 1% of Bordeaux fluids, 50% carbendazim 500 times fluid, or 75% chlorothalonil wettable powder 1500 times, each spraying interval 10-15 days.
Brown leaf spot of Euonymus japonicus
Symptoms: Yellow or brown dots appear on the new leaves and gradually expand into irregular spots with a diameter of 3-10 mm. After the lesion turned grayish brown or gray, darker edges, lesions on the wheel and many black moldy spots.