Ts 
The Green-Bug or Spring Grain-Aphis. 9 
Unless grain growers are willing to cooperate and put into effect 
measures for the destruction of volunteer grain, it will be difficult for 
Fie. 7.—The spring grain-aphis (Toxoptera graminum): Wheat plant showing winged 
and wingless viviparous females with their young clustered on the leaves, and a few 
parasitized individuals on lower leaves. About natural size. (Webster and Phillips.) 
the Federal Department of Agriculture to expend further money to 
best advantage for investigational purposes in connection with the 
