Abstract
Japanese pear trees became infected with Glomerella cingulata when they were planted in plots covered with diseased leaves but not in plots that were free of fallen leaves. The fungus was isolated more frequently during the winter from buds of pear shoots sampled from damaged orchards than from those of pear shoots sampled from orchards without anthracnose. Dormant buds on diseased shoots incubated under moist conditions produced salmon-pink conidial masses. These results suggest that fallen leaves and buds can be primary inoculum sources of the fungus.
