EXPERIMENT STATION REPORTS. 



229 



the dates computed are preferable to dates determined merely by guess 

 work. The difficulty thus far has consisted in getting enough early 

 "wormy" apples to fill the cages in time. 



Much remains to be done in perfecting details and in determining the 

 exact value of the influence of Lake Michigan in retarding the season 

 in its immediate vicinity and in determining the influence of different 

 soil conditions. 



Fig. 7 — Typiciil burrow of codling moth. Conspicuous about the core 

 GRAPE BLOSSOM MIDGE. 



{Contarima johnsoni.) 

 This insect which rather recently appeared in our state has heretofore 



Fig. 8 — Buds of grape. 



The dark cojored and swollen buds contain the maggots of the grape-blossom 

 midge 



