ENEMIES OF CONIFEROUS TREES 257 



prevent the escape of the wary insect. Burning 

 all brushwood in plantations is a great preventive. 



Wherever Scotch Pines are grown the beetle 

 is usually abundant, and at Bostal Wood, in the 

 Metropolitan area, its attacks on these trees have 

 been persistent and severe for many years. 



On the Wobum estate, the writer had to cut 

 down about seventy acres of a Scotch Pine plan- 

 tation in order to assist in getting rid of this 

 troublesome beetle. 



Pine Weevil (Hylobitis ahietis) is another de- 

 structive insect, and differs from the former in 

 waging its attacks against the buds of the leaders 

 and branches, as also eating patches of the bark 

 here and there on the stems and branches. The 

 various species of Abies suffer most, but the pines 

 occasionally are attacked as well. It is always 

 most destructive in young plantations growing 

 on the margins of old woods, and equally bad 

 amongst trees that have been planted on the site 

 of a former pine plantation. The beetle is about 

 half an inch long, and nearly black. One remedy, 

 probably the best, is to place fresh pieces of pine 

 bark on the ground, beneath the infested trees, 

 and, by shaking the trees and examining the 

 traps the following morning, many may be 

 destroyed. 



Bostrichtis typographus is another pest of our 

 woodlands, and may frequently be seen, like fine 

 white wool, spreading over the stems and branches 

 of the silver and other firs. It spreads with terrible 

 rapidity, first appearing in small patches here and 

 there on the bole, and particularly on the under 

 sides of the branches. The infested tree soon 



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