July, 1914.] THE APPLE MAGGOT. 33 



OCCURRENCE OF EARLY VARIETIES IN ' NEW HAMPSHIRE 



ORCHARDS. 



Consideration of Table 1 discloses some facts of interest sug- 

 gestive of the relative abundance of certain varieties of fruit in 

 the sections covered by these reports. It should be remembered 

 that the groAver was asked to let his report indicate conditions as 

 regards fruit free of attack as well as that attacked, as he knew 

 them in his neighborhood. It is a reasonable inference therefore 

 that the grower checked off in most cases all or most of the varie- 

 ties to be found in his own and neighboring orchards. 



The twelve varieties on which reports were received, postively 

 or negatively, from the largest number of growers were as follows, 

 listed in order of number of reports received: 



Porter, Baldwin, August Sweet, Red Astrachan, Pound Sweet 

 (or Pumpkin Sweet), Northern Spy, R. I. Greening, Gravenstein, 

 Hubbardston, King, Earlj'- Harvest, and Roxbury. 



Of these 12 varieties, 6 are summer or fall fruit, and out of 

 these 6 there are 5 varieties notoriously severely attacked by the 

 apple maggot, namely, the Porter, August Sweet, Pound Sweet, 

 Hubbardston and Early Harvest. The fact that fruit of this 

 character is so commonly to be found somewhere on many New 

 Hampshire farms is a factor of consequence in the persistence and 

 destructiveness of the maggot. 



SOME FACTORS INFLUENCING COMPARATIVE INFESTATION BY 



VARIETIES. 



In Table 2 the 42 varieties reported on from 10 or more 

 orchards are listed in their order of comparative freedom from 

 infestation by the maggot, according to the experience of the 

 growers reporting, together with brief remarks concerning 

 the date of ripening of the variety and the characteristics of 

 the fruit, as given by Beach (1). 



Early Ripening. Later in this bulletin, under a discussion 

 of the comparative mortality of eggs and larvae of the maggot in 

 various varieties of apples, observations will be found indicating 

 the marked adaptability of early ripening fruit to the life economy 

 of the maggot, and the equally marked absence of such adapta- 

 bility in the case of the harder winter varieties. The date when a 

 variety ripens, therefore, or more especially its habit of falling 



