Forest planting; a treatise on the care of timber lands and the restoration of denuded wood-lands on plains and montains by Jarchow Henry Nicholas

Author:Jarchow, Henry Nicholas
Language: eng
Format: epub, pdf
Tags: Forests and forestry, Reforestation
Publisher: New York, Orange Judd
Published: 1893-03-25T05:00:00+00:00

are always to be found but not numerous ; others appear seldom, but when they appear, they muster up dangerously great numbers ; some are slow in their movements and walk only; others fly and cover very quickly large stretches of forests.

From this it Avill be seen that a keen observation is required to be able to employ at the right time, and in the right place, the proper means to moderate the damages, and to prevent the further spreading of insect-pests. The most efficacious measure of obtaining these results consists in sparing and even fostering the multiplication of the natural enemies of the injurious insects. The equilibrium between useful and obnoxious animals is kept up in the animal kingdom by the production of such animals as persecute the injurious ones. This law is nowhere more obvious than with insects. There a considerable number can be looked upon by their destruction of obnoxious insects as real benefactors to mankind.

It is further recommended as a preventive means from insect ravages the removal of stumps, dry trees and branches, cut wood and timber, and the peeling off the bark from timber in case it cannot be shifted from the forest, whereby the breeding-places of insects are destroyed. The most effective means to suppress the insect-plague, especially in wild or natural forests, is the introduction of a systematic management, of which the first step would be a correct and periodically repeated thinning by which we in time obtain a thoroughly sound and vigorous growth of Irees—and to such trees obnoxious insects cannot do much harm.

If the just mentioned means to prevent the spread of injurious insects are observed, it is not difficult to get rid of them completely. For this purpose the bark of trees invaded by insects should be stripped off and burnt, the dead trees should be cut, and unless removed.

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