44 The Pine Sawfly. 



The Pine Sawfly is a very destructive one 

 to young plantations of Scotch pine. They 

 feed upon the leaves, and when one tree has 

 been stripped they pass on en masse to 

 another, and their depredations sometimes 

 extend over very large areas. The sawfly 

 appears in early summer, and the eggs are 

 deposited in the pine-leaves by the saw-like 

 ovipositor ; these the female covers with a 

 resinous substance. In about three weeks 

 the caterpillars hatch, and feed upon the 

 tree for about two months, when they enter 

 the moss and leaves at the foot of the tree and 

 form their cocoons ; these are about one inch 

 long, and when in this state they may be 

 raked together and destroyed by burning. 

 They sometimes remain a long while in the 

 cocoons, but eventually the perfect insects 

 appear in the summer. 



The remedy lies in the destruction of the 

 pest in one or other of its forms. The 

 caterpillars may be shaken off the trees and 

 destroyed below, or the cocoons, as stated, 

 may be raked together and burnt. 



The Pine Weevil attacks all the coniferous 



