224: SUCCESSFUL FRUIT CULTURE 



upward and comes out on the other side. When the 

 insect comes out of the tree it leaves a clean hole, and 

 when one of these holes is found nothing need be done 

 other than to prevent the decay of the injured parts by 

 filling the hole with putty or forcing in linseed oil. Its 

 presence may be known by the chips or droppings that 

 are found forced out of its hole, or by the discoloration 

 of the bark under the injured parts. 



Remedy The best and cheapest way to overcome 

 the injury of this pest is to examine the tree twice 

 each year, in August to find the very young larvae, and 



c 



Fig. 115 The Round-Headed Apple Tree Borer 



again in the following June to destroy those that may 

 have escaped in the August examination, digging out 

 the larvae with a pointed knife or killing with a wire. 

 In doing this work, first pare off the outer bark until 

 the opening where the larva entered is found, then 

 follow the channel until the larvae are reached, or until 

 the upward burrow is found, and insert the wire. If 

 the larvae are very young they will be destroyed in the 

 operation of paring off the outer bark, but if deep in 

 the tree considerable effort will be sometimes needed 

 to' reach them. 



The Flat-Headed Apple Tree Borer (Chrysobothris 

 femorata) (Figure 116) This beotle is smaller than the 



