178 



MONTANA EXPERIMENT STATION. 



the insects that our Montana cherry growers should be on the look- 

 out for. 



The winter is passed by the immature insect in the ground. If 

 this pest becomes established in Montana it will most likely be 

 through the introduction of infested cherries. Wormy cherries re- 

 jected from those pitted for canning and thrown out on the refuse 

 pile would furnish all the necessary conditions for the infection of 

 any cherry trees in the vicinity that might be in bearing the next 

 season. 



Fig. 25. The Cherry Fruit-fly: Section of a cherry, enlarged to show the 

 maggot and the nature of its work. The small figures above show the mag- 

 got and its parent, the fruit-fly, natural size. (Slingerland, Bull. 172, Cornell 

 Univ. Exp. Sta., 1899.) 



