THE LEAF BLISTER MITE. 



Notwithstanding the minute size of these creatures, they fall prey' 

 in considerable numbers, as observed by Prof. Parrott in Xew York 

 State, to the attack of a mite (Seins pomi Parrott) which he thinks 

 materially assists in reducino- their numbers. 



METHODS OF CONTROL. 



The leaf blister mite will yield to thorough treatment with kero- 

 sene emulsion, miscible oils, or lime-sidphur washes. The use of 



Fic. 4. — Leaf blister mite {Eriopht/es pyri) : 1, Dorsal view 



enlarged. (After Nalepa.j 



ventral view. Greatly 



these sprays, as for the San Jose scale, should also protect orchards 

 from important injury from the mites. When it is necessary to 

 spray for the mites alone, and in cases of severe infestation, as has 

 been noted in apple orchards in New York State, two treatments 

 have been recommended b}^ Parrott. using standard kerosene emul- 

 sion diluted Avith 5 parts of water. One application should be given 

 in late fall as soon as most of the leaves have fallen and another the 

 following spring l)efore the trees put out foliage. If both the fall 

 and spring applications are not practicable, the preference should be 



