QUINCE DISEASES 397 
the name applied to the disease irrespective of the location of 
the galls on the tree. The same disease affects the apple, peach 
and other plants. Pacific Coast growers meet with this trouble 
more than others in the United States. The disease also occurs 
in Africa. (See Apple, page 108.) 
REFERENCES 
Hedgecock, G. G. Some stem tumors or knots on apple and quince 
trees. U.S. Agr. Dept. Plant Indus. Bur. Cire. 3: 5-16. 1908. 
(Other references, page 112.) 
