MAINE) AGRICULTURAL EXPERIMENT STATION. IQIt). 37I 



The maggot, pupa, and adult fly are shown in the accompany- 

 ing illustration, enlarged about 3 times. (Fig. 24). 



PREVENTIVE MEASURES. 



As pointed out here, it is useless to try to poison the growing 

 maggots as they are within and protected by the apple. It is 

 also evident that if the maggots contained in windfalls and 

 picked fruit are destroyed one year there will be no trouble to 

 fear from them the next. Of course it is highly improbable 

 that even by the greatest vigilance, every maggot could be thus 

 destroyed. But when it is considered that each maggot left to 

 its own devices has a chance of becoming a fly capable of lay- 

 ing at least three hundred eggs, and that each maggot unde- 

 stroyed this year may mean three or four hundred next year» 

 the importance of killing as many as possible is evident. If the 

 apple maggots, as do many insects, all developed about the 

 same time, the problem would be much simpler, but as full 

 grown maggots are found in apples from before the middle of 

 August until into the winter, the watch for them must extend 

 over several months. 



If enough hogs or sheep to eat the windfalls are kept under 

 infested trees from the second week in August until the fruit 

 is finally gathered, all the maggots in windfalls will be got rid 

 of. Of course the same results, as far as destroying the mag- 

 gots is concerned, can be obtained by having windfalls faithfully 

 gathered during this time and fed to stock, or made into cider. 



In one orchard where the main crop is not sweet fruit, a plan 

 of baiting for the apple maggot has proven successful. A few 

 Tolman sweet trees are grown in the orchard as traps. The 

 flies deposit the majority of eggs in these sweet apples by 

 preference, and the other fruit is saved to a great extent. All 

 of the Tolman sweet apples, in this case, are gathered and 

 destroyed. 



4. Plum Curculio. 



( Conotrachelus nenuphar.) 

 At about the time in early spring when vegetation resumes 

 activity and buds begin to push, curculios, which have hiber- 

 nated under rubbish on the ground, under the rough bark of 



