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Leaf scorch on Japanese aralia (Fatsia japonica), spotted laurel (Aucuba japonica 'Variegata'), and rhododendron

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Japanese aralia and spotted laurel are shade-loving plants that cannot tolerate strong sunlight. The scorching sun of midsummer often severely burns their young leaves, causing the young leaves to curl, turn yellow, and wither, or the leaves to scorch, seriously affecting plant growth. Certain pathogenic fungi then seize the opportunity to invade, further causing infectious diseases, and now fungal fruiting bodies can be seen on some of the lesions. Rhododendron is a semi-shade-loving plant, and the cause of its leaf scorch is similar to the above. Young leaves are more severely affected, and this disease causes a large amount of abnormal leaf drop in the plants. Control methods: (1) Because midsummer often brings sudden, relatively strong wind and rain,

Japanese aralia and spotted laurel are shade-loving plants that cannot tolerate strong sunlight. The scorching sun of midsummer often severely burns their young leaves, causing the young leaves to curl, turn yellow, and wither, or the leaves to scorch, seriously affecting plant growth. Certain pathogenic fungi then seize the opportunity to invade, further causing infectious diseases, and now fungal fruiting bodies can be seen on some of the lesions. Rhododendron is a semi-shade-loving plant, and the cause of its leaf scorch is similar to the above. Young leaves are more severely affected, and this disease causes a large amount of abnormal leaf drop in the plants.

Control methods:

(1) Because midsummer often brings sudden, relatively strong wind and rain, existing diseased leaves and fallen leaves on the ground must be promptly removed and destroyed on site, to prevent existing pathogens from using wind and rain to expand the scope of infection and damage;

(2) Strengthen management, enhance tree growth vigor, and improve plant disease resistance;

(3) Spray chemicals to suppress the development and spread of the disease: chlorothalonil 800-fold solution, Topsin M 3000-4000-fold solution, sprayed once every 7-10 days.

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