Image from page 66 of “Indian forest insects of economic importance. Coleoptera” (1914)
Title: Indian forest insects of economic importance. Coleoptera
Year: 1914 (1910s)
Authors: Stebbing, Edward Percy, 1870-1960
Subjects: Beetles Forest insects — India Trees — Diseases and pests
Publisher: London Eyre & Spottiswoode
Contributing Library: Earth Sciences – University of Toronto
Digitizing Sponsor: MSN
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FlG. 18.—Weathering action set up in the sapwoottree at the point of attack of the caterpillar ofceramicus. A, the point at which the grub tunnelled into thewood to pupate. 3o INDIAN FOREST INSECTS Fortunately, however, some of the most serious of forest pests, thelarge class of bark- and wood-boring insects (and their predators and para-sitic foes, the friends of the forester), can be studied by every Forest Officerout in the forest in a comparatively simple manner. All that is required is that two or three green healthy trees of thespecies whose pests it is wished to study should be felled in some con-venient locality. The trees should not be felled in deep shade, nor inpositions in which they will receive the full force of the midday sun, whichwill dry them up too quickly. By visiting such trees, say, weekly or fortnightly, and stripping off apiece of bark so as to examine the bast layer on its inner side and the outersapwood on the stem itself, a vast amount of information of im
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