File:Indian forest insects of economic importance. Coleoptera (1914) (14802848363).jpg

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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oftenasked to suggest a possible treatment in cases where damage of this natureis taking place. The avenue and trees of the station compound are all liable to insectattack, and more especially is this so in the drier parts of the country. Thelongicorn-borer attack in Quetta (JEolesthes, see p. 307) is an evidence ofthe state to which careful planting work can be reduced if the insectspreying upon the trees are not known and watched. OX METHODS OF PREVENTING INSECT ATTACK 53 The first protective step, which will greatly tend to diminish danger ofthis nature, is to plant avenues with several different species of trees alter-nating with one another. • It is the pure avenues—i.e., avenues consisting allof one species—which are liable to suffer most seriously from insect damage. I inspected a tun-tree avenue in Bengal some years ago. It was pure,and there was scarcely a tree worth maintaining on the ground, so badlyhad the crowns been attacked by the tun twig-borer (Hypsipyla). The -
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FlG. 27. —Section of stem of a I>allcr^ia sisst> tree, showing the sapwood riddled anddestroyed by the wood-borers Siiio.\vlon crassnm, Lesne, and -V. nnalc. Changa Manga. crowns were thin and straggly, and afforded little shade, besides beingvery unsightly, and the owner (the avenue \v;is on a tea plantation) had thewhole thing cut down and replanted. It is best, therefore, to avoid plantingpure avenues; but if such are desired, choose a tree which is not liable to beattacked by some of the common insect pests. Fruit trees are often used in this manner with a view to obtaining ayearly revenue from the fruit. These trees require watching just as they do 54 INDIAN FOREST INSECTS in the orchard, for they are liable to insect attack. Mango-trees are badlyinfested by several longicorns (Batocera, p. 367, Ploccederus, p. 295, etc.), andby a buprestid (Belionota, p. 217), these beetles killing off large branchesor the whole tree, as was evidenced in a bad attack of these bor

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