vo 



BuKEAU OF Farmers' Institutes. 



Fig. 1 Sugar maple borer, parent 

 beetle (orlglual). 



direction for a part of their course, it is by no means uncommon 

 to see trees partly girdled through the activity of this borer. I 

 have seen maples fifteen and eighteen inches in diameter half 



girdled by a single burrow. It is ap- 

 parent to all that only a few such 

 borers are necessary to cause con- 

 siderable injury. The beautiful par- 

 ent beetle, represented at figure 1, is 

 rarely seen, but evidences of the in- 

 sect's work are very apparent. The 

 large, white, fleshy grub or borer is 

 not often observed. It is a most in- 

 sidious worker and probably the best 

 method of controlling it on shade 

 trees is to search each fall for the dis- 

 colored, wounded areas, showing the 

 place where the young larvae have entered the bark, and then to 

 destroy the pests. There is little danger of harming the tree more 

 by digging the borer out than the creature would if left to itself. 



The young borers fre- 

 quently enter the tree at 

 favorable points on the 

 trunk and branches just 

 as the larger limbs 

 spring out from the main 

 stem. Applications of 

 the soap carbolic acid 

 wash about the middle of 

 Ma}', and renewal of the 

 same in June, would 

 probably aid somewhat in preventing the deposition of eggs, 

 though at present it is impossible to state the true value of this 

 preventive. 



Elm Tjorer. — American elms are frequently attacked by a borer 

 working beneath the bark. There is no practical method of flght- 



Fio. 2 Elm borer: a adult; 6 half grown larva— hair 

 line represents natural size of latter (original). 



