Indian forest insects of economic importance Coleoptera . .— The larger branches of the tree, coveredby old thick bark, are tunnelled into anddestroyed by most of the insects, bothbast-eating and wood-boring, which infestthe main stem. Where the bark commences to thinout, the insects we have already men-tioned as infesting poles will be foundto be present, and they occupy all thepart of the crown up to the twigs. Alittle experience will show7 that thedividing lines between the species in-festing the areas covered by old thickbark, thin younger bark, and the green cortex-covered twigs, are very
Indian forest insects of economic importance Coleoptera . .— The larger branches of the tree, coveredby old thick bark, are tunnelled into anddestroyed by most of the insects, bothbast-eating and wood-boring, which infestthe main stem. Where the bark commences to thinout, the insects we have already men-tioned as infesting poles will be foundto be present, and they occupy all thepart of the crown up to the twigs. Alittle experience will show7 that thedividing lines between the species in-festing the areas covered by old thickbark, thin younger bark, and the green cortex-covered twigs, are very fairly sharply marked off, each havingih-ir own set of insects. There are, however, some pests whichinfest ever\- part of the tree with the exception of the young green cortex-covered twigs. The 1 iranches of the sal-tree are infested by a small buprestid beetle,Acmaeodera <p. 193), and by a cerambycid, Xylotrcchus (p. 347). The twigs:nid young saplings of the sal-tree suffer severely from the tapping propensi-ties of the Mnnophlebus scale 9.—Larval galleries of lloplo- i>n/>Y.\ spinicornis, Newn., in bast and sapwood of sal (much n .lured . • Plate II. V: js) -- •
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbeetles, bookyear1914
