Entomosporium leaf spot—Entomosporium mespili or E. maculatum
Entomosporium is a fungal disease that spots the leaves of plants in the Pomoideae group of the rose
family, including apple, flowering crab apple, evergreen pear, hawthorn, pear, photinia, pyracantha, quince,
Rhaphiolepis, and toyon. Tiny reddish spots, sometimes surrounded by a yellow halo, appear on the
leaves of infected plants, usually on older growth. These spots darken and enlarge as the leaves mature.
Spore-forming bodies eventually appear in the center of the spots; these dark fruiting bodies may appear
to be covered with a glossy membrane, beneath which white masses of spores may be visible. Infected plants
may prematurely drop many leaves.
Identification | Life cycle
Remove and dispose of spotted leaves that are on
plants or have fallen. Do not water overhead as this spreads the
fungus spores and favors infection. Reduce humidity around plants
by providing adequate space
between them and by pruning lower branches. Consider removing
groundcovers beneath shrubs and mulching or maintaining bare soil
instead. In very severe or special cases, copper
compounds or chlorothalonil may be used as a preventative treatment.
Entomosporium leaf spot
Entomosporium leaf spot on evergreen pear