58 



MASS. EXPERIMENT STATION BULLETIN 353 



they return to the ground. There in burrows from 1 to 8 inches below the surface 

 the females lay their eggs within oval cavities in the center of balls of earth which 

 are held together by a glutinous secretion supplied by the female. For egg laying 

 the beetles evidently prefer areas in grass or small grain in the vicinity of those 

 trees and shrubs on which they feed, although other sites may sometimes be 

 chosen. When infested fields are planted to corn or other crops on which the 

 grubs feed, serious injury is apt to result. 



— 1 '7?///(iO 



^ 



77V/. 





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.4AW/. I /^^y \ ^M^^ X^u^J^ I ^i/<?- \sf^/: ocr \ /^k /fez* I ^j,w. I /^ns; Vm, 



Diagram which covers a period of three years illustrating complete life cycle of white grubs 

 and showing the periods during which they can be killed by plowing. 



Courtesy, Bur. Ent. and Plant Quarantine, U. S. Dept. Agr. 



