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How is the condition of Euonymus japonicus disease? Let us help you recognize the common disease symptoms
1. Symptoms: In the early stage of the disease, there are small yellow spots on the leaves, which gradually turn yellowish-brown and expand into round or irregular spots. The diameter of the spots is 2 mm to 10 mm. In the later stage, the spots become grayish-brown or grayish-white, with darker edges, and many small black dots form on the spots. In severe cases, the spots merge into one large area, and the leaves turn yellow and fall off. 2. Disease pattern: The pathogen overwinters in the form of mycelium and other structures on diseased leaves or fallen leaves, serving as the primary infection source. Spores are spread by wind and rain. In the spring of the following year, as the temperature rises, conidia are produced,