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THE CANADIAN FORESTER'S 



ment does not go on for many years. In the general 

 economy of nature, the Creator has always placed the 

 remedy near Ihe evil, and so we see. that all insects 

 have one or more enemies, in the shape of other insects 

 or birds, which prey upon them. And it is worthy of 

 observation that, when any tribe of insects begins to in- 

 crease in a ratio that menaces the equilibrium, so to 

 speak, of vegetation, the enemies of that tribe almost 

 simultaneously begin to multiply, and in a very short 

 time, often in two years, things return to tl^eir ordinary 

 condition 



Though man be almost impotent against the attacks 

 of insects in the forest, he can defend himself rather 



114. — A tree well and badly pruned. 



more easily, and often even successfully in the nursery. 

 I will point out concisely the remedies usually em- 

 ployed. Every one can decide, regard being had to the 

 sort of insects which he, in his own nursery, has to con- 

 tend with, what means he prefers to employ. 



It is fully proved that by burning brushwood, etc. 

 near the nursery, a multitude of moths injurious to the 

 trees will commit suicide. 



Stretch a cloth on the ground under the trees, shake 

 the latter well, and it is surprising what a number of 

 insects will be caught. Sweeping the branches with a 

 bropm, will destroy many of the cocoon-spinning cater- 

 pillars. 



