University of Maryland Extension

Leaf Spot of Red Tip Photinia

Entomosporium leaf spot is one of the most common diseases of photinia (red tip) in the landscape. Other names of this disease include Diplocarpon or Fabrea leaf blight. This pathogen will also infect more than 60 species of landscape plants in the rose family. Susceptible genera include Amelanchier, Aronia, Chaenomeles, Cotoneaster, Crataegus, Cydonia, Malus, Photinia, Pyracantha, Pyrus, and Sorbus.

photinia leaf spot
Closeup of leaf spots
Photo: Luke N. Gustafson, UME
shrubs thin out
Thinning of hedge
Photo: Luke N. Gustafson, UME

disease causes defoliation
Severe defoliation
Photo: Photo: Luke N. Gustafson, UME

Symptoms begin as small spots that usually coalesce into large dead areas. Lesions on plants such as Photinia frequently have reddish brown margins with gray centers. Infected plants will defoliate before mid summer and secondary infections frequently cause extensive disease on new foliage.

Management

Rake and dispose of infected foliage, avoid overhead irrigation, also avoid mid summer pruning that may stimulate flushes of susceptible foliage and select resistant varieties when available. Registered fungicides to protect new growth may be needed on highly susceptible cultivars.

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