INSECTS ATTACKING WHEAT. 



35 



Since 1885 the Hessian Fly has remained "with us," doing 

 annually considerable damage, though just how much it is diffi- 

 cult to estimate. The observations made on the fly in this State 

 lead me to emphasize the previously-suggested remedy of late 

 planting, at earliest after September 25, and the careful destruc- 

 tion of the early springing up volunteer wheat, as the two most 

 beneficial measures to be adopted by the Kansas wheat-grower in 

 his struggle with this pest. 



WHEAT-STRAW WORM. 

 (Isosoma tritici Riley; Order, Hymenoptera.) 



Diagnosis. The plants stunted in growth; heads do not fill 

 out, and ripen prematurely. Examination of the stem ( by split- 

 ting it) shows one or more small, white grubs in the joints next 

 to the head, or in the one next below this. 



FIG. 17. WHEAT-STRAW WORM; a, pupa in cell in wheat straw; 6, larva; c, pupa; 

 d, adult (without wings). 



