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PEAR GROWING IN CALIFORNIA. 





FIG. 171. 



Pears injured while in bloom by 

 blister mite. 



PEAR-LEAF RUST MITE (Epitrimerus pyri). 



This pest was first discovered in California by the writer in 1913. 

 Its occurrence is recognized by a dry rusty appearance of the foliage of 

 pear trees, especially younger trees from one to five years of age. It is 

 even smaller than the blister-mite and singly can not be recognized with 

 the naked eye. Sometimes they are so abundant on foliage that clus- 

 ters of them may be seen as little dust-like markings on the surface of 

 leaves. Hibernation takes place underneath bud scales, as in the case 

 of the blister-mite. 



Control. 

 Formula No. 8, applied any time that the pest appears, will control. 



FIG. 172. Pear leaf rust mite. (After Nalepa from Parrott.) 



PEAR THRIPS (Taeniothrips pyri). 



In the Central California Coast Eegion and in the Northern and Cen- 

 tral California Interior Valley Region, or that portion lying along the 

 Sacramento River, this pest is probably the most serious insect pest of 

 the pear. Hibernation takes place in the soil and early in the spring 



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