APPLE INSECTS 35 



July with arsenate of lead, 4 pounds in 100 gallons of water, most 

 of the flies will be killed. It has been suggested that the addi- 

 tion of molasses or sirup to the poison spray would make it more 

 attractive to the flies, but the experience of the majority of 

 commercial growers indicates that this is unnecessary. When 

 orchards are well cultivated, so as to give a minimum of pro- 

 tection to the puparia through the winter, and when a good sys- 

 tem of spraying is practiced, the apple maggot is not troublesome. 

 It is probable that under these conditions most of the flies are 

 killed by the arsenate of lead used for the control of the codlin- 

 moth. 



References 



Maine Agr. Exp. Sta., Ann. Rept., 1889, pp. 190-241. 



Maine Agr. Exp. Sta. Bull. 109. 1904. 



R. I. Agr. Exp. Sta., Ann. Rept., 1904, pp. 191-201. 



U. S. Bur. Ent. Circ. 101, 1908. 



Cornell Agr. Exp. Sta. Bull. 324. 1912. 



The Apple Curculio 



Anthonomus quadrigibhus Say 



Apples are subject to attack by three species of weevils 

 which are, in the order of their importance, the plum curculio, 

 the apple curculio and the apple weevil. The first will be 

 discussed in detail under plum insects (page 243). 



The apple curculio is generally distributed over the Eastern 

 states and Canada, where it breeds abundantly in wild crab 

 and thorn apples. As an apple pest its work has often been 

 confused with that of the plum curculio, for the two species 

 usually work together and deform the fruit in a similar manner. 



It has come into prominence principally in Missouri and 

 southern Illinois, and as a rule only in connection with destruc- 

 tive outbreaks of the plum curculio. Conditions favoring the 

 presence of the one seem also to favor the abundance of the 



