﻿Jul. 1137, U. S. Dept. of Agriculture. 



Plate III. 



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aJ| b 



Wheat Plants Infested by the Hessian Fly Compared with an 

 Uninfested Plant. 



A, B, and' C, Spring-wheat plants infested by the. Hessian fly; D, healthy plant of the same 

 age for comparison. The infested plants are much dwarfed and show the same dark-green 

 color in comparison with the healthy plant as is shown in Plate II, D and E. E, Winter- 

 wheat plants infested by the Hessian fly, showing larvse (1) and puparia (2) (flaxseeds) 

 of the insect. The leaf sheaths have been stripped away. 



