Efficiency evaluation of Neem (Azadirachta indica) oil and copper-ethanolamine in the protection of wood against a subterranean termite attack

Ocena učinkovitosti nimovega olja (Azadirachta indica) ter baker-etanolaminskih pripravkov pri zaščiti lesa pred napadom podzemnega termita

Authors

  • Tatiana Mbitnkeu Fetnga Tchebe
  • Jean-Bosco Saha Tchinda
  • Alexis Ngueteu Kamlo
  • Desiré Chimeni Yomeni
  • Arnaud Maxime Cheumani Yona
  • Maurice Ndikontar Kor

DOI:

https://doi.org/10.26614/les-wood.2020.v69n01a04

Keywords:

neem oil, copper, ethanolamine, wood, preservation, leaching, termite

Abstract

The demand for environmentally safe preservatives for wood is increasing all around the world. This study is focused on the evaluation of the ability of Neem (Azadirachta indica) seed oil and copper-ethanolamine to protect Sydney blue gum (Eucalyptus saligna) and Ayous (Triplochiton scleroxylon) against termites. Wood blocks were impregnated with solutions of Neem oil in acetone and/or an aqueous solution of copper-ethanolamine. Impregnated woods with a retention rate of up to 108.3 kg/m3 were obtained. A leaching experiment was used to determine the fixation of preservatives in wood. The termicidial effect of the preservatives was studied through exposure in a termitarium. Neem oil was less efficient for Sydney blue gum but showed significant protection for Ayous at a higher retention rate. At the concentration investigated, the treatment of both wood species with copper-ethanolamine solution was not suitable. However, a combination of copper-ethanolamine and Neem oil showed an improvement in the protection of Sydney blue gum wood. Nevertheless, the impregnated woods still suffered an increased termite attack after leaching.

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Published

20.06.2020

Issue

Section

Articles

How to Cite

Mbitnkeu Fetnga Tchebe, T., Saha Tchinda, J.-B., Ngueteu Kamlo, A., Chimeni Yomeni, D., Cheumani Yona, A. M., & Ndikontar Kor, M. (2020). Efficiency evaluation of Neem (Azadirachta indica) oil and copper-ethanolamine in the protection of wood against a subterranean termite attack: Ocena učinkovitosti nimovega olja (Azadirachta indica) ter baker-etanolaminskih pripravkov pri zaščiti lesa pred napadom podzemnega termita. Les/Wood, 69(1), 47-56. https://doi.org/10.26614/les-wood.2020.v69n01a04