Skip to Main Content
Effects of Teak, Tectona grandis Linn, heartwood extractives against Heterotermes indicola (Isoptera: Rhinotermitidae)Author(s): Babar Hassan; Sohail Ahmed; Mark Mankowski; Grant Kirker; Rebecca Ibach; Muhammad Misbah ul Haq
Source: Proceedings, IRG annual meeting. The International Research Group on Wood Protection. 1-16.
Publication Series: Paper (invited, offered, keynote)
Station: Forest Products Laboratory
PDF: Download Publication (345.0 KB)
DescriptionHeartwood extractives from Tectona grandis were investigated for antitermitic activities against Heterotermes indicola in laboratory experiments. Extractives were removed from wood shavings by soxhlet extraction using an ethanol: toluene (2:1) solvent system. Termite feeding and mortality followed a concentration dependent response. The highest termite mortality occurred at an extractive concentration of 10 mg/ml. The calculated LC50 based on the concentration dependant response was 3.2 mg/ml. Extractives showed high repellency and antifeedant activity against H. indicola. Tests in which extractives were used to vacuum-pressure treat southern pine and cottonwood, showed that T. grandis extractives imparted resistance to these non-durable species. At the highest concentration of extractives tested, complete mortality was observed after termites were exposed to extractive-treated southern pine and cottonwood. Compared to solvent controls, minimum weight losses of 3.6 and 3.5% were observed for extractive-treated southern pine and cottonwood, respectively, at the 10mg/ml concentration after 28 days of exposure. Termites exposed to a subset of extractive treated then leached southern pine and cottonwood showed high mortality. These results suggest that T. grandis extractives have antitermitic properties and may be potentially useful in the development of environmentally friendly wood preservative.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationHassan, Babar; Ahmed, Sohail; Mankowski, Mark; Kirker, Grant; Ibach, Rebecca E; Misbah ul Haq, Muhammad. 2018. Effects of Teak, Tectona grandis Linn, heartwood extractives against Heterotermes indicola (Isoptera: Rhinotermitidae). In: Proceedings, IRG annual meeting. The International Research Group on Wood Protection. 1-16.
KeywordsTectona grandis, preservative, lower termite, extractive transfer, Heterotermes indicola
- Antitermitic Activities of Shisham (Dalbergia Sissoo Roxb.) Heartwood Extractives against two Termite Species
- Ex-situ performance of extracts from naturally durable heartwood species and their potential as wood preservatives
- Effects of White Mulberry (Morus alba) Heartwood Extract Against Reticulitermes flavipes (Blattodea: Rhinotermitidae)
XML: View XML