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Fletcher (T. B.) lS: Ghosh (C. C). The Preservation of Wood against 

 Termites. — Rept. Proc. 3ni Entom. Meeting, Piisa, Februarv 1919, 

 Calcutta, ii, 1920, pp. 705-712. 



The results of the treatment of wood with v^arious substances as a 

 preventive against attack by termites are shown in a series of tables, 

 several different kinds of timber being used in the experiments. The 

 x'arious processes are placed in the order of their efficiency as follows : — 

 hot creosote, more than 81 months efficiency ; cold creosote, less than 

 28 months ; carbolineum, 23 months ; Powell process, 21 months ; 

 lead arsenate, 16 months; mortant, 15 months; sideroleum, 14 months ; 

 microlineum, 14 months; solignum, 12 months; zinc chloride, 

 12 months; timborite, 11 months; lead chromate, 7 months; 

 siderosthen, 4 months. 



Attention is called to the fact that treatment is of little iise unless 

 the whole surface subject to attack is treated, and that if wood is cut 

 after treatment, the exposed surface is especially liable to attack. 



Fletcher (T. B.) & Ghosh (C. C). Stored Grain Pests.— 7?^/)/. Pyoc. 

 3rd Entom. Meeting, Piisa, Febritarv 1919, Calcutta, ii, 1920, 

 pp. 712-761, 25 plates. 



The list of granar}' pests in India, in addition to those recorded for 

 the Punjab [R.A.E., A, v, 126-128] include :--In cereals, the 

 Coleoptera, Trogoderma khapra [R.A.E., A, v, 359], Tenebroides 

 mauritanicus, Attagenus piceus and Gibbiiim scotias ; in pulses, Bruchus 

 chinensis and other Bruchids, and T. khapra ; in spices, Lasioderma 

 serricorne, and Anobium sp. ; and the general storage pests, Alphitobius 

 piceus, Ephestia cautella, Pyralis pictalis and P. farinalis. 



Details of the life-history and habits of the more important of these 

 pests, as occurring under Pusa conditions, are described. There has 

 been some difference of opinion as to the status of T. mauritanicus. 

 These beetles are predaceous upon Calandra oryzae, but they also attack 

 the grain, upon which the grubs live entirely, and must therefore be 

 regarded as noxious. The rate of development is, however, too slow 

 to render them a serious pest. Gibbium scotias has not previously 

 been recorded as a grain pest, but in stored wheat is found to complete 

 a generation in one month. Small, white eggs are laid among the 

 grain on which both grubs and adults feed. This beetle has also been 

 found boring into opium cakes and damaging papers. It is a household 

 insect, and may prove to be serious, as its multiplication is rapid. 

 Attagenus piceus is also recorded for the first time as a pest of stored 

 grain, but is not of much importance. 



Lists are gi\'en of grains, etc., commonly stored in houses, that are 

 immune to attacks of these granary pests and of those that are affected 

 by them. 



A number of storage receptacles in use among the natives are 

 described and photographed. Eighteen storage experiments with 

 wheat, husked rice and pulses are described and the results discussed. 

 The results to be aimed at in successful storage of grain are that it 

 should not b(> damaged by insects, that it should not lose its germinating 

 power when required for use as seed, and that it should not deteriorate 

 in quality. The \arious types of earthern vessels, mud-bins and 

 bamboo-bins used in the nati\'e households cannot be made insect- 

 proof. There is no treatment known that can immunise the grain 

 against insects even for a few months. The safest method is to store 



