75 



Unfortunately, in too many cases the storm-killed and iDJured trees 

 will be carelessly permitted to remain as a nidus for borers, and when 

 this wood becomes too dry and the bark too loose for the insects those 

 that have bred in them will emerge and migrate to neighboring trees. 



Before the following spring the progeny of these insects will have so 

 loosened the bark that it may easily be removed and burned, thus 

 destroying millions of the insects before they have an opportunity to 

 issue and lay their eggs for the destruction of valuable trees. 



In Europe in similar cases it is customary for foresters to girdle a few 

 trees here and there and leave them standing as traps for such beetles 

 as may not have been destroyed with their host trees. These trees in 

 turn are decorticated the following year and others treated in like man- 

 ner should appearances indicate the advisability of this course. 



Some instances were noticed of chestnuts infested in dooryards and 

 of a giant spruce near a public building. For the protection of valu- 

 able shade trees against borer attacks other more direct measures may 

 be employed. A light coating of raupenleim and dendrolene to the 

 trunks and lower branches would answer the purpose of preventing 

 the deposition of eggs at this point, which is the favorite place of attack, 

 while a heavier application would prevent the egress of the insects 

 from the bark should the trees already be infested. A wash of lime to 

 which a small quantity of Paris green and a sufficient amount of glue 

 to render it adhesive has been added would also serve a good purpose. 



Whatever is used should be applied just before the first warm spell 

 of spring. At the very outset of an attack a very thin application of 

 kerosene, kerosene emulsion, or creosote by lightly brushing or spray- 

 ing it over the infested parts would kill the beetles with which it came 

 in contact. 



