68 PINE. 
bark off to lighten the carriage in transit to market. The dressing-off 
of the bark should not be permitted within the plantation ; in a year 
after, the ground round these heaps of bark may be seen covered with 
brown shoots blown from the growing trees, bored by the beetles 
which the heaps have nurtured.” * 
Where attention can be given to trapping, some of the slabs and 
trimmings may be utilized for this purpose. The pieces of waste 
wood with the bark on may be laid, if of some size, bark uppermost, 
on the ground, or supported against a tree, and before the time for 
development of the beetles arrives, they can easily be collected and 
burnt. But it should be well seen to that operatives who may beg the 
waste material for firewood do not simply stack it and keep it to suit their 
own convenience for burning, in which case all the trouble of preparing 
the ‘‘traps’’ will have been of no use. The beetles will come out and 
fly to the trees just as readily as from the rubbish in the plantations. 
A convenient form of trap-wood is made by cutting off lengths of the 
tops of young Scotch Firs, and setting these against standing trees, or 
placed in some way in which the “ poles’”’ (so to call them, for it is 
best to clear off the side branches) will not lie flat amongst damp grass, 
as the beetles prefer a more exposed position for egg-laying. These 
poles, of course, like all other ‘“ trap-wood,” should be destroyed before 
the time of beetle development. 
It is hardly possible to enter on all details of minutiz of preventive 
treatment, but the great principle is to remove all fallen timber, or 
broken wood, or sickly trees before they are furnishing infestations of 
beetles to the trees arourd; or if the numbers are too great to be dealt 
with in this way, to do what can be done by barking. 
* Note by Mr. W. McCorquodale in ‘ Manual of Injurious Insects,’ by Editor, 
p. 245. 
