SPRUCE BUDWORM-AND WHITE PINE WEEVIL 163 
more mature. Its removal would also be accomplished with less 
mechanical injury to the more valuable white pine. 
Experimental Plot No. 4.—Similar in general construction to 
Plots 1 and 2, but with some rapid growing broad-leaf tree replac- 
ing the Scotch pine. It is believed at least equal immunity for the 
pine or spruce would be secured, but care would probably have to be 
exercised to prevent some of the pines from being shaded out. An 
occasional judicial thinning might be necessary, but this should not 
be carried far enough to make large openings in the cover until 
the size of the pines (more than thirty feet high) make them 
comparatively immune from injury. 
There is every reason to believe that any of the experimental 
plots suggested above would be successful to a considerable degree. 
Perhaps a small percentage of the protected pines would suffer 
injury, but this percentage would never be great, and in no way 
compare with the injury in pure plantations or that occurring in 
the protecting border of trap trees. However, in all cases there 
should be a systematic effort at reducing the number of weevils by 
conscientiously collecting and treating the infested leaders through- 
out the plot, and better and more certain results will be secured if 
the natural growth in the vicinity is treated in alike manner. This 
would require only a few hours’, or at the outside only a few 
days’ labor per year especially if the man is equipped with long- 
handled pruning hook. 
