no 



Badly infested branches and trunks should be cut out and burned 

 in winter or spring, so as to destroy the grubs contained. Some good 

 may be done by examining the trunks and larger branches in the fall and 

 cutting out the small grubs betrayed by the castings. It is better to 

 select other trees for planting in localities infested by this destructive 

 borer. 



The Poplar Borer, Saperda calcarata, is a common and destructive 

 enemy to poplars. 



The adults emerge from the wood during the summer, and the young 

 larvae may be found working in the bark during the autumn. The whitish 

 larvae or grubs live within the wood for probably three years, attaining 

 a length of nearly two inches, and drive their tunnels through the trunk 

 in all directions. The writer has taken them from the heart-wood of the 

 largest poplars. Rough, discoloured scars and swollen areas on the trunk 

 and branches of poplars are frequently caused by this insect, and dying 

 branches and portions of the trunk are a common result of its work. 



Infested trees of little value should be removed and burned before 

 June. Valuable trees may be protected in large measure by searching 

 for the young borers in the bark, during the fall, and destroying them. 

 The older grubs may sometimes be killed by injecting benzine or carbon 

 bisulphide into the borings. 



The Lilac borer, Podosesia syringae, is a common pest of lilacs. The 

 white caterpillar bores in the base of the stem which it girdles and kills. 

 Valuable lilacs should be examined during the early summer and any 

 borers in the stems removed with a sharp knife and killed. The holes 

 should be coated with tar or creosote and filled with putty. Dying stems 

 should be removed as soon as discovered and the borers found and 

 destroyed. 



The Oak Twig Pruner, Elaphidion villosum, is frequently injurious 

 in southern Quebec to twigs of oaks. The grubs excavate tunnels in the 

 twigs causing them to break off. When the fallen twigs are very numerous 

 the injury is more or less serious. The fallen twigs contain the grubs, 

 and should be gathered and burned shortly after they have fallen, so that 

 the contained grubs will be destroyed and the spread of the infestation 

 checked. 



The Carpenter Worm, Prionoxystus robiniae, is a large white or 

 reddish white caterpillar with a brownish head, about 2 1-2 inches long. 

 The adult is a large grayish moth with mottled wings. The female moth 

 deposits eggs in crevices of the bark, and the caterpillar bores through 



