I76 MAINE) AGRICULTURAL EXPERIMENT STATION. I904. 



decreasing. One of these, however, makes the suggestive 

 remark that the windfalls in neighboring orchards are left on the 

 ground. 



It is impossible to ascertain the exact effect, if any, of climatic 

 conditions upon the question. Even if it were possible, the 

 knowledge would probably not prove helpful, for there could be 

 no control of natural climatic conditions on a scale sufficiently 

 large to control this pest. 



All things considered, it seems perfectly justifiable to conclude 

 that those orchardists from all parts of the State who have said 

 — -"We destroy the windfalls and the trouble is decreasing with 

 us" — have answered their own question as to what shall be done 

 with the apple maggot. 



From many counties the reports concerning the varieties dam- 

 aged came in general terms, indicating that nearly all sweet fall 

 apples and mild sour ones are troubled more than the hard win- 

 ter fruit. 



Although the lists on pages 177 and 178 are not at all complete, 

 perhaps they will not be altogether devoid of interest. They 

 indicate that while in some orchards even the most susceptible 

 varieties may escape infestation, the maggot is capable of adapt- 

 ing itself to most kinds of apples and that there is no certainty 

 that any variety is safe until the orchardist is sure that hundreds 

 of maggots are not burying themselves in his orchard every fall. 



The plate facing this page shows, in figure 28, apples with 

 characteristic larval trails which give rise to the popular name, 

 "railroad worm." Figure 29 shows, in cross section of apples, 

 the advanced work of the maggots. Figures 30, 31, 32, repre- 

 sent three stages of the apple maggot — the fly, the larva, and the 

 pupa, all enlarged. 



