69 



M3 3 

 ENT 



tHniberstitp of iSIaine. 



ricu 



lOD 



ORONO 



BULLETIN 251 



APRIL, 1916 



CONTROL OF APPLE MAGGOT BY POISONED 

 BAIT SPRAY. 



CONTENTS. 



PAGE 



Poisoned Bait Studies in America 149 



Investigations Here Reported 153 



Dates of Emergence of Flies 153 



Experiments with Kinds and Amounts of Poisons 154 



Orchard Experiments with Poisoned Bait 156 



Results in Orchards 162 



Results in Residential District 164 



Conclusions 166 



Explanation of Map 167 



Map 168 



