Identifier: indianforestinse00stebuoft (find matches)
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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was proved in the SimlaCatchment Area in 1908, when immature living grubs were found in thetrees at the beginning of April. The damage committed by this insect when numerous in a forest is very serious. The young larvae require absolutely fresh Damage Committed i , ,, r ,, r, , . , . in the Forest. green bast, and therefore the eggs are very often laid in green, and apparently green standing, trees. The irregular method of feeding of the grubs renders the insect moredestructive than would ordinarily be the case, as they girdle a tree muchmore rapidly, even when but a moderate number of insects are present, thanis ordinarily the case with bark-borers. Instances have been seen wheretrees attacked at the base only have been ringed by a comparatively fewlarvae and so killed. Within the limits defined by their several lifehistories, bark-borers of the Scolytus type go into a tree anywhere, and thusrequire to be unusually abundant before their operations ring and kill a tree. PLATE XIII. t
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Larval galleries (with living larvae in situ) Q( Sphenoptera atcrrima. Kerrem.,on the inner surface of the bark of the deodar (Cedrns dcodara). Simla CatchmentArea Forests, North-West Himalaya. FAMILY BUPRESTIDAE 207 The buprestid attacks trees of all sizes, but it was perhaps foundto be most abundant in the Simla Catchment Area in snow-bent andbroken green saplings, of which there were a number in the forest. A characteristic of this insect appears to be that it always attacks thetrees on the sunny side, i.e. the southern ; if the tree is bent over, as in thecase of snow-breaks, it invariably attacks it on the upper side. This is inexact opposition to the habits of the bark-boring insects, which usually attackon the northern or, in the case of bent or felled trees, on the under side.This habit renders the two pests, when working together as they were inthe Simla Catchment Area in 1908, more deadly, as they kill the treesquicker. The methods of dealing with the deodar bark-borer (Scol

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