330 ELEMENTARY STUDIES IN INSECT LIFE 



reason of its size it is an attractive prey for parasites, 

 and seldom bec'omes abundant enough to become serious. 



Remedies - Hand-picking. Arsenites. 



Wheat. CHINCH-BUG. See under Corn. 



HESSIAN FLY. (Cecidomyia destructor Say; order 

 Diptera.) During the winter, small brown seed-pods 

 ("flax-seeds") may be found in the plants near the 

 roots. These are the chrysalids. Small black two- 

 winged flies emerge from these in April and May. The 

 young whitish grubs attack the stalks near the base. 

 From two to four broods. The fall brood lays its eggs 

 before the 20th of September. It attacks rye and 

 barley. 



Remedy. Burn or plow under stubble immediately 

 after harvest, and destroy summer brood which is then 

 in " flax-seed " stage. Keep down the volunteer wheat ; 

 postpone sowing the wheat, until after the 20th of Sep- 

 tember, when eggs will have been deposited on other 

 plants. Fertilizers added in spring materially aid in- 

 fected wheat to tiller, and thus outgrow the injury. 



FALL ARMY WORM. (Laphygma frugiperda Smith 

 and Abb.; order Lepidoptera.) A pale-brown cater- 

 pillar ; feeds upon wheat, corn, rye, and other suc- 

 culent plants, during September and October. Fre- 

 quently travel together in the same direction in quest of 

 food, whence the name. 



Remedy. Late fall plowing of fields where pests 

 have been ; crushing caterpillars with the roller. Wheat- 

 fields eaten off in fall are not necessarily destroyed. 



GRASSHOPPER. See under Corn. 



WHITE ANTS or TERMITES. - These insects frequent 



