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Symptoms and Control Methods of Privet Leaf Rust

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Privet, also known as wintergreen and wax insect tree, is an evergreen small tree native to China and Japan. It likes light and tolerates slight shade, prefers warm and humid conditions, is suitable for slightly alkaline soil, is slightly cold-resistant, and has strong resistance to air pollution. Privet is a commonly used landscaping tree in courtyards and can be used as hedges and courtyard landscaping trees. Symptoms: Round brown spots appear on the surface of infected leaves and gradually become sunken, while the corresponding parts on the back of the leaves bulge. The mesophyll of the diseased area thickens and turns yellow or purplish red, after which many cup-shaped rust spore receptacles grow on the raised spots. Rust spores

Privet, also known as wintergreen and wax insect tree, is an evergreen small tree native to China and Japan. It likes light and tolerates slight shade, prefers warm and humid conditions, is suitable for slightly alkaline soil, is slightly cold-resistant, and has strong resistance to air pollution. Privet is a commonly used landscaping tree in courtyards and can be used as hedges and courtyard landscaping trees.

Symptoms: Round brown spots appear on the surface of infected leaves and gradually become sunken, while the corresponding parts on the back of the leaves bulge. The mesophyll of the diseased area thickens and turns yellow or purplish red, after which many cup-shaped rust spore receptacles grow on the raised spots. Rust spore receptacles also occur on the petioles, and infected petioles become slightly swollen. When the disease is severe, the leaves become deformed and die.

Pathogen: The pathogen is the privet rust fungus (Aecidium klugkistianum Diet.), belonging to the Basidiomycota, Teliomycetes, Uredinales fungi.

Occurrence pattern: This disease harms various privets, and April to June is the peak period of disease occurrence.

Control: 1. Remove fallen leaves at any time and burn them in a centralized manner. 2. Spray 1:1:200 Bordeaux mixture.

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