24 X. H. AGR. EXPERIMENT STATION. [Bulletin 171 



ingly favorable to the pest. In most orchards the damage goes 

 essentially unchecked. In a few it is well under control. 



BLANKS SENT TO GROWERS. 



In the winter of 1909-1910. following a year of excessive abun- 

 dance of the apple maggot, a circular letter was addressed to about 

 300 fruit-growers, representing practically all sections of the 

 southern two thirds of New Hampshire. This is the part 

 of the state in which the apple is grown commercially. 



In this circular information was asked along the following 

 lines : 



the amount of injury from the apple maggot in the neighbor- 

 hood, and whether injury is increasing; 



the number of trees infested in the orchard of the correspondent, 

 and the location and surroundings of the same; 



the length of time that the trees had been infested; 



the practice of the owner in the matter of permitting sheep, 

 pigs, cattle or chickens in all or part of the orchard; 



how long live stock remained under the trees in the fruiting 

 season, and the possible benefits of this practice; 



the existence of wild apples near the orchard, and the infes- 

 tation of the same by the maggot; 



the practice of the owner in the matter of picking up drops in 

 his orchard; 



the surroundings as regards neglected trees infested bj^ the 

 maggot ; 



the practice of the owner in the matter of ordinary spraying 

 or other treatment for insect pests. 



With this circular was included a list of varieties of apples 

 commonly found in New Hampshire orchards, which the grower 

 was asked to check off to show the conditions in his locality in 

 the matter of susceptibility of different varieties. 



Two hundred and twenty-two replies were received from these 

 circulars, the correspondents being located in 129 towns in the 

 state, representing all sections. The location of these points is 

 shown in Chart 2. 



Following this, further correspondence was conducted; from 

 time to time, other growers were consulted; additional circulars 

 were sent out, and with a proportion the preliminary inquiry 



