18 N. H. AGR, EXPERIMENT STATION. [Bulletin 171 



furnished valuabl:; observations on the maggot in the course of 

 the previous years. Twenty-seven growers stated that they had 

 noted "wormy" blueberries, and a few described the condition 

 in such manner as to lead to a surmise that the infestation may 

 have been due to the maggot. There was no proof of course in 

 any instance that this was certainly the case. 



On the chance of securing further data a search was made for 

 pupae beneath blueberry bushes reported to have shown numer- 

 ous wormy berries the prior season. The locality was Alton, 

 N. H., and the dates were June 6 to 9, 1914. The variety of 

 blueberry was the high-bush, Vaccinium corymhosum. In all 44 

 pupse were found. One half of these were placed in moist sand in 

 an incubator at 80 degrees Fahrenheit, and the other half in the 

 open-air insectary. From each lot adults were secured and were 

 identified as Rhagoletis pomonella. They were much smaller 

 than the adults reared from pupae derived from apples, or those 

 observed around apple trees. The fact seems interesting that 

 among the many adults noted or caught in the open around 

 apples in the last four years, none were specially observed of the 

 strikingly small size of the specimens reared from the pupae from 

 blueberries. 



That blueberries or huckleberries may have been the original 

 host of the apple maggot is conceivable. Both of these fruits are 

 well represented in the flora of the northeastern United States 

 (36). That their berries furnish sufficient food for maturing 

 the maggot is demonstrated by the fact that numbers of pupae 

 were secured in the Maine experiments of 1913 and in New 

 Hampshire in 1914. 



Among blueberries there are the three species already noted, 

 each of which is found through the greater part of the range of 

 the apple maggot. In addition there is Vaccinium corymhosum, 

 the highbush blueberry of the northeastern states. 



. Of huckleberries there are three species common in the north 

 eastern states, Gaylussada dumosa, G. frondosa, and G. resinosa. 

 A fourth species, G. hrachycera, is found in the central eastern 

 states only. 



