Miscellaneous Publication 168, U. S. Department of Agriculture 



Plate 1 1 



:_ ' 



HI 



• 



* fp 



Diseases and injuries of pear and quince: A, Scab; B, C, black spot; D, pear leaf blister 

 mite injury; E, copper injury; F, ammonia injury; G, H, sodium chloro-2-phenyl- 

 phenate injury. 



