Privet (Ligustrum) is a popular hedge plant, but it can be affected by two main diseases: Phomopsis gall and Glomerella twig blight and canker. Proper identification and timely pruning are key to maintaining healthy plants.
Symptoms: Knobby galls up to 6 inches long and 1.5 inches in diameter form on stems of common privet.
Pathogen: Phomopsis spp.
Management: Prune out infected stems.
Symptoms: Twigs of common, European, and Lodense privet die back. Cankers develop pinkish fungal fruiting structures. Bark splits, and plants die when girdled.
Pathogen: Glomerella cingulata (asexual stage: Colletotrichum)
Management: Plant resistant cultivars such as 'Amur', 'California', 'Ibota', or 'Regal'.
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