354 



Insect Pests. 



black. These "galls " vary from mere specks up to ^ inch in length. 

 Many often unite, and then the leaves fall off. The effect may be 

 noticed as soon as the leaves begin to unfold, and it is in this early 

 period that much damage is done. 



On the fruitlets small reddish pustules appear as soon as the 

 blossom has fallen or even when still out. 



Attacked fruitlets were noticed to be entirely destroyed, but 

 sometimes they appear to partially recover and then stunted fruit 

 results. 



On cutting a section of the galled leaf the mites, very few in 



(F. Edenden. 



FIG. 233. PKAR FRUITLETS ATTACKED BY THE MITE (Eriophl/es pyri). 



number, will be found in the mesophyll tissues. It has been noticed 

 that when trees have their leaves attacked the fruit is small and 

 gritty (1). I do not know if this is invariably the case, although 

 several correspondents have pointed it out. 



All varieties of pears are attacked; notes have been sent me of 

 its presence on over a dozen kinds in harmful numbers. 



Nalepa (5) records it from the service berry (Amelanchicr 

 vulgaris, Monch), the cotoneaster (Cotoneaster vulgar-is, Lincl.), 

 the white beam tree (Sorbus aria, Crautz), the mountain ash (S. 

 aucuparia), and the wild service tree (S. torminalis, Crautz). 



