It has been recently shown that Fire Blight, so common on pear, apple and quince, also affects the cherry in the Pacific Northwest. As yet, however, it is not very prevalent on this fruit and the damage thus far is comparatively slight.
The disease appears at first as small pits in the surface of the fruit. The lesions are few for a time, but gradually their number increases until they occur over practically the whole surface. As a result the cherry becomes shrunken and wilted.
Amber-colored, sticky drops of bacterial ooze, similar to those appearing on blighted pear fruits, are sometimes observed on affected cherries. (Detailed discussion of Fire Blight under Pear, page 323.)
Hotson, J. S. Fire blight on cherries. Phytopath. 5:312 - 315. 1915.