8o VERMONT AGRICULTURAL REPORT. 



destroying it. The work of removing a two or three year old larva is, 

 of course, much more laborious than that of getting rid of the younger 

 ones located nearer the surface. And, moreover, their presence in the 

 tree is less readily detected. Orchards which have been carefully gone 

 over twice during each season, from the time of planting, will contain 

 few, if any, larva of the second or third season's growth. 



Carbon bi-sulfid is recommended by some for the destruction of borers 

 in the tree. A small amount of this substance is inserted into the tun- 

 nel of the borer and the hole stopped up with moist earth, or, better, 

 with grafting wax. This method, while effective, and, if used judiciously, 

 not harmful to the tree, does not seem to the writer practicable. At all 

 events it is not a remedy to be recommended without qualification. Car- 

 bon bi-sulfid is somewhat expensive, and exceedingly explosive. It 

 should be kept from flame and the fumes should not be breathed. 



