Testing Antitermitic Properties of Brazilian Woods and Their Extracts


  • Fairie Lyn Carter
  • Celia R. R. de Camargo


Termite control, <i>Calophyllum brasiliense</i>, <i>Carapa guianensis</i>, <i>Cedrela odorata</i>, <i>Diplotropis</i> spp, <i>Mezilaurus itauba</i>, <i>Ocotea cymbarum</i>, <i>Platymiscium ulei</i>, <i>Sweetia nitens</i>


A program on natural resistance of Brazilian woods to termites was initiated to obtain information valuable for more efficient utilization of various wood species of the Brazilian Amazon. Comparisons were made of the survival and feeding responses of Reticulitermes flavipes (Kollar) and Coptotermes formosanus Shiraki exposed to heartwood blocks and paper pads treated with extracts from eleven Brazilian woods. In no-choice block tests, no survival and little feeding occurred on Calophyllum brasiliense, Carapa guianensis, Cedrela odorata, Diplotropis spp., Mezilaurus itauba, Ocotea cymbarum, Platymiscium ulei, and Sweetia nitens. Micrandra siphonioides was the most favorable wood for both termite species. In choice block tests of all eleven woods, termites ignored most woods, eating primarily M. siphonioides and then small amounts of a few other woods.

Success in extracting antitermitic substances from milled heartwood of the eleven species varied with woods and solvents (successive cold extraction with hexane, acetone. 54:44:2 mixture of acetone-hexane-water, and 80% methanol). Termiticidal extracts were obtained from nine woods. In no-choice tests. R. flavipes did not survive the 8 week test period on seventeen extracts: C. formosanus did not survive on fourteen extracts. These extracts will be used for further study in research on potential termiticides from termite-resistant woods. Methods used in this study will be applied to tests in Brazil on various wood species against Brazilian termites.


Beal, R. H., P. L. Carter, and C. R. Southwell. 1974. Survival and feeding of subterranean termites on tropical woods. For. Prod. J.24(8):44-48.nBecker, G. 1969. Rearing of termites and testing methods used in the laboratory. Pages 351-385 in K. Krishna and F. M. Weesner, eds. Biology of termites, vol. 1. Academic Press, New York and London. 598 pp.nBrazier, J. D. 1975. Properties and uses of Brazilian woods. J. Inst. Wood Sci.7(2):50-57.nCarter, F. L. 1979 (Printed 1981). Responses of Reticulitermes flavipes to selected North American hardwoods and their extracts. Int. J. Wood Preserv.1(4):153-160.nCarter, F. L., and J. B. Huffman. 1982. Termite responses to wood and extracts of melafeuca. Wood Sci.14(3):127-133.nCarter, F. L., and R. V. Smythe. 1974. Feeding and survival responses of Reticulitermes flavipes (Kollar) to extractives of wood from 11 coniferous genera. Holzforschung28(2):41-45.nCarter, F. L., R. H. Beal, and J. D. Bultman. 1975. Extraction of antitermitic substances from 23 tropical hardwoods. Wood Sci.8(1):406-410.nCarter, F. L., C. A. Stringer, and M. A. Taras. 1979. Termiticidal properties of slash pine wood related to position in the tree. Wood Sci.12(1):46-51.nGay, F. J., T. Greaves, F. G. Holdaway, and A. H. Wetherly. 1955. Standard laboratory colonies of termites for evaluating the resistance of timber, timber preservatives, and other materials to termite attack. C.S.I.R.O. Bull. No. 277, Melbourne, Australia. 64 pp.nRuyooka. D. H. A. 1978. Effect of high temperature drying on the natural resistance of wood to termite attack. Material u. Organismen13(4):263-271.nSmythe, R. V., and F. L. Carter. 1970. Feeding responses to sound wood by Coptotermes formosanus, Reticulitermes flavipes, and R. virginicus (Isoptera: Rhinotermitidae). Ann. Ento-mol. Soc. Am.63(3):841-847.nSteel, R. G. D., and J. H. Torrie. 1980. Principles and procedures of statistics. A biometrical approach. 2nd ed. McGraw-Hill Book Co., New York. 633 pp.nVan der Slooten, H. J., L. C. Fedalto, C. D. J. Lisboa, J. E. de Melo, A. de S. Mendes, and M. S. Filho. 1980. Amazonian timbers: Characteristics and utilization, vol. 1. Brazilian Institute for Forestry Development-IBDF, edited by National Council Scientific Technological Development-CNPq. 152 pp.nWolcott, G. N. 1957. Inherent natural resistance of woods to the attack of the West Indian dry-wood termite, Cryptotermes brevis Walker. J. Agric., Univ. Puerto Rico41:259-311.n






Research Contributions