46 MAINE AGRICULTURAL EXPERIMENT STATION. 



ing plants that particularly attract the beetles. Spiraeas, Deut- 

 zias, Andromeda, magnolias, blackberries, and white roses are 

 especially useful as counter-attractives. The beetles swarm on 

 the flowers of these plants in preference to many varieties of 

 fruits,, and when thus massed in great numbers, their destruc- 

 tion by the use of collectors or other mechanical means is greatly 

 facilitated. All ground which might serve as a breeding place 

 and which it is possible so to treat, should be plowed and har- 

 rowed early in May for the destruction of the larvae or pupae. 



