SMOASNI* ATG 
UNITED STATES DEPARTMENT OF AGRICULTURE 
FARMERS’ 
BULLETIN 
WasuincTon, D. C. 763 NovEMBER 29, 1916 
Contribution from the Bureau of Entomology, L. O. Howard, Chief. 
ORCHARD BARKBEETLES AND PINHOLE BORERS, AND 
HOW TO CONTROL THEM. 
By Frep E. Brooks, 
Entomological Assistant, Deciduous Fruit Insect Investigations. 
INTRODUCTION. 
This bulletin gives a brief account of the principal barkbeetles 
and related species that attack apple, peach, plum, and other orchard 
Fic. 1.—Exit holes of the fruit-tree barkbeetle in sections of trunk of young apple 
tree. About natural size. (Original.) 
trees and describes the methods most effective in controlling them. 
These troublesome insects are small beetles which belong to two 
Norr.—This bulletin is of interest to fruit growers generally, especially in the territory 
east of the Rocky Mountains. 
55651°—Bull 763—16 
