12 
COI.ORADO Experiment Station 
the apple is cut through, the core cavity and seeds are found to be 
blackened, and in severe cases the surrounding flesh may be dis¬ 
colored. 
Control .— (i) Sanitation. Diseased fruit should be either col¬ 
lected from the ground in the fall, or plowed under. Trees should 
be kept in good health. 
(2) Spray with Bordeaux 4-5-50, or lime-sulfur, just before 
the buds open in the spring. 
(3) Avoid injuring fruit before placing in storage. 
Crown Gate. —Galls may appear on root, stem, or leaf. In 
orchard fruits, they are most common at the crown, forming there, 
large warty swellings (Plate III). There are two types of galls, 
Plate III. Crown gall on a six-year-old plum tree. The warty growth is hard and woody. 
