August, ’24] 
DRAKE, FENTON AND BUTCHER: HESSIAN FLY 
485 
Fig. 14. Graph showing daily egg, fly and flaxseed records at the Mills County 
District Station, Imogene. 1923 
laid on the 100 wheat plants during the 27-day emergence period from 
September 8 to October 4, an average of 333.5 per day. From the two 
concentration cages 645 flies issued and 664 were caught on the migration 
