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May Highlights (under construction - please come back another time)

Things to watch for during May

From our experience of samples we have received during May in previous years in the OSU Plant Clinic, this page will highlight some problems that may occur this month.

Fungal disorders


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Bacterial disorders

Damage caused by species of Pseudomonas including Pseudomonas syringae, on woody ornamentals, particularly lilac, are typically seen at this time of year. The cool, wet spring favors disease by Pseudomonas syringae. These bacteria overwinter in diseased twigs or as epiphytes on healthy wood.

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Dappled willow

Abiotic disorders


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See also "The Plant Clinic Year"