292 



Wisconsin State Horticultural Society. 



cultivated apple tree, and finding the food especially adapted to 

 their wants, they increased rapidly, and soon became one of the 

 greatest foes of the apple. The fact that, silently and unseen, they 

 are eating out the heart of the orchard, and their work of de- 

 struction is often nearly complete before their presence even is 

 known, makes them a foe more to be dreaded. Trees on high and 

 dry locations are more exposed to their attacks than others. The 

 failure of many trees in our orchards, which is usually attributed 

 to other causes, is doubtless largely due to the insiduous working 

 of this pest and its co-partner in destruction, the flat-headed borer. 

 It is a very common cause of complaint that trees kill themselves 

 by over-bearing, when the cause of this extreme fruitfulness is the 

 gnawing away of the heart by these destroyers, and the whole 

 energies of the tree are thrown into a last effort to perpetuate 

 its species. 



luff/ //Iff Al,Ui 





Fig. 14. Round Headed Apple Tree Borer. 



The perfect beetle is seldom seen, as it hides during the day and 

 flies only at night. When once seen it is easily distinguished by 



