The Plum and Aijple Curculio. 259 



iiddition of lime to the poison is strongly recommended. As a last 

 a)reventative may be mentioned 



5. Avoidance of Extraneous Sources of Infestation. If a well 

 kept orchard is near to a badly infested one, or to extensive patches 

 •of wild plum, crab-apple or wild haw, the former is liable to injury by 

 -curculios flying in from the infested trees. The only way of avoiding 

 this evil is to apply cultural methods to the neglected orchard or 

 ito remove the patches of native trees, and it is conceivable that in 

 most instances both of these alternatives would prove all but impossible. 

 Fortunately only a single instance of such difficulty has come under 

 the observation of the writer, and the indications are that this state 

 of affairs in Nebraska is rare. 



