ITS Principles of Plant Culture. 



every still morning as long as any beetles are found. 

 Any light wood frame, covered with cloth may be used 

 as a substitute for the more convenient device shown 



in the figure. "Where 

 the substitute is 

 used, the beeles 

 must be looked for 

 on the sheet and de- 



FiG. 76. Cuiculio catcher. It is wheeled stroyed ES tound. 



beneath the branches of the tree, and ^„„„„:„r.^ ^^io/^i-.o 



the latter are struck with a light, cloth- Arsenica! pOlSOns 



covered mallet, which Jars the beetles i" ^ 



upon the sheet-covered frame, from which applieo. aS SOOn aS 



they roll into the box beneath. For small , 



trees, the trunk slips in through the slot leaves appear On 



at the left. .i j i j. 



the trees and at 

 frequent intervals thereafter are also very beneficial in 

 the control of this pest. 



315. The Prompt Destruction of Infested Fruit ma- 

 terially aids in keeping the fruit-burrowing insects in 

 subjection. Hogs and sheep in the orchard are most 

 valuable assistants in this work. The apple-maggot* 

 is more effectually controlled in this manner than by 

 any other known method. 



316. Sucking Insects include many species. They 

 feed on the juices of the plant which they infest, and 

 do not directly devour its tissues, as do the eating in- 

 sects; but they reduce its vitality by their continual 

 drain upon the reserve food. The so-called scale in- 

 sects belong to this class. These are especially difficult 

 to destroy, since they are dormant the greater part of 

 the year, and in this condition are protected by their 

 comparatively resistant scales. 



' Trypeta pomonella. 



