ELEVENTH ANNUAL MEETING. 



89 



injuries of the trees. The adult female is black with two orange- 

 colored bands across the body. Among the experiments which 

 have been tried in order to discover an effective remedy for the 

 peach borer, Prof. Slingerland has found that a coating of gas 

 tar placed about the base of the tree is quite eft'ective, but this 

 sometimes injures young trees and is not therefore safe to 

 apply. Hydraulic cement, wire netting, tarred paper, and many 

 other things have been used on the trunks of peach trees with- 

 out success. After all, the only sure thing is to dig them out. 

 The only successful preventive is the gas tar, and that is dan- 

 gerous on account of the damage to the trees. 



Fig. 7. — Round-Headed Apple Tree Borer. 



A serious pest is the common fruit bark beetle or shot hole 

 borer, Scolytiis rugulosiis, which attacks the peach and Japanese 

 plum, often killing trees. The round holes are where the adults 

 have issued from the bark. If we remove the bark we find a large 

 number of tunnels where the larvae have been reared, most of 

 them, however, not descending into the hard wood. All the 

 transformations take place inside of the bark. These adults some- 

 times feed upon the small twigs in June and July, occasionally 

 causing a good deal of damage. They bore in at the base of 

 the twigs, which soon die. This can probably be prevented if 

 the tree is well sprayed with Paris green. 



