MySheen

Brown spot of Euonymus tomentosa

Published: 2024-11-06 Author: mysheen
Last Updated: 2024/11/06, Symptoms: yellow or brown dots are produced on the new leaves, which gradually expand into near-round irregular spots with a diameter of up to 3Mel 10mm. After the disease spot becomes grayish brown or grayish white, the edge color is darker, there are wheel lines and many black mildew spots on the disease spot. Pathogen and pathogenesis: fungi. CercosporadestructiuaRav. Is a half-known bacterium. The disease began to occur in the middle and late May, reached its peak in August, and basically stopped after November. Coarse

Symptoms: yellow or brown dots are produced on the new leaves, which gradually expand into near-round irregular spots with a diameter of up to 3Mel 10mm. After the disease spot becomes grayish brown or grayish white, the edge color is darker, there are wheel lines and many black mildew spots on the disease spot.

Pathogen and pathogenesis: fungi. CercosporadestructiuaRav. Is a half-known bacterium. The disease began to occur in the middle and late May, reached its peak in August, and basically stopped after November. Extensive management, rainy, poor ventilation and light transmission, cold weather in spring, hot summer, lack of fertilizer and water, diseases are easy to occur.

Prevention and control methods: (1) timely removal of diseased leaves. (2) spray 1% equal dose Bordeaux liquid, 50% carbendazim 500x solution, or 1500 times chlorothalonil wettable powder in the onset season, with an interval of 10ml for 15 days.

 
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