Thumbnail Image

Comparative study on the efficacy of biobased wood preservative over conventional wood preservatives against fungi and termites

XV World Forestry Congress, 2-6 May 2022

Year of publication 2022

Place of publication Rome, Italy ;

Pages 13 p.

Author Kumar, A., Mehra, T.S., John, A., Hazarika, B.N.

Publisher FAO ;

Product type Article

Synopsis (short abstract) The current focus of wood preservation research is on developing wood preservatives from natural and environmentally compatible compounds for industrial application. Liquefaction of wood is one of the promising approaches to utilize woody waste where the wood meal is converted into a chemically active liquid with the help of a liquefying agent like polyhydric alcohols, phenol, cresol, and plant-based solvent as CNSL and Cardanol. Conventional wood preservatives like CCA, ASCU, Creosote, Chlorpyriphos based temic and termisel as synthetic chemicals were in use for a long time, has also been used in prescribed proportion. The efficacy and economic suitability of liquefied wood as a wood preservative along with conventional wood preservative against termite and fungi have been studied. Wood samples were impregnated with both conventional and liquefied wood diluted with methanol and were subjected and evaluated as per Bureau of Indian Standards (BIS) in terms of its antifungal (IS4873, Part I:2008) and termiticidal activities (IS4833:1993) accelerated termite graveyard test and fungal resistance test. The level of impregnation of liquefied wood in wood was estimated by determining the weight percent gain. In the graveyard test, samples were periodically observed for 24 months. The results indicated that Samples treated with phenol-assisted liquefied wood, CNSL based wood polyols, Cardanol based polyols exhibited better results as compare to conventional synthetic wood preservatives both in visual observation and percentage weight loss as compare to initial condition and untreated control samples. The percentage weight loss of liquefied wood polyols (phenol, CNSL, and cardanol individually) treated wood sample was ranging from only 5-20% of its initial weight; wood treated with preservatives (CCA, ASCU, Creosote and chlorpyriphos) shows % weight loss varied from 40- 60% and did not exhibit better resistance against termite and fungi as compared to the untreated samples. The treated samples were also exposed to fungus for 16 weeks. The fungicidal traits of liquefied wood polyols (phenolated, CNSL, and cardanol individually) treated wood showed higher antifungal efficacy against both white rot and brown rot of wood, conventionally wood treated preservatives (CCA, ASCU, Creosote and chlorpyriphos) shows low efficacy against termite and fungus. Since wood residue is a byproduct of primary and secondary wood processing industry whereas CNSL and Cardanol are by-products of Cashewnut processing unit, so its utilization as wood preservatives will be a value-added product to the wood-based Industry... Keywords: Preservatives, Impregnation, Liquefied wood, antifungal ID: 3625875

Language English

Also available in:
No results found.

Related items

Showing items related by metadata.

  • Thumbnail Image
    Document
    Isolation of DNA from preserved woods for identification of wood species through genetic analysis regardless of the age of wood production
    XV World Forestry Congress, 2-6 May 2022
    2022
    Also available in:
    No results found.
    Species identification of wood provides important information for archaeology, restoration of cultural assets, preventing illegal logging, and more. Wood species are usually identified based on their anatomical features with the use of a microscope. However, this method may not be able to distinguish between anatomically similar species or subspecies. To overcome this problem, wood species need to be identified at the molecular level using DNA sequencing. However, unlike living plant cells, wood is difficult to pulverize using a mortar, and DNA extraction from dried wood is challenging. To solve these problems, we propose a pretreatment method in which wood is pulverized using 60-grit sandpaper and hydrated with water for 2 days. Using this method, we were able to stably amplify the rpoB gene from the extracted DNA of Pinus rigida. In addition, sequence analysis of the rpoB gene revealed six single nucleotide polymorphisms (SNPs), which classified the rpoB sequences in the genus Pinus into five groups. Our data indicate that although these SNPs were not suitable for species identification, they can potentially be used to determine the origin of different wood subspecies or individual samples of wood. Keywords: Monitoring and data collection, Research ID: 3616978
  • Thumbnail Image
    Article
    The preservation of natural forests through the establishment of industrial wood production plantations via the new, fast growing Robinia pseudoacacia ‘Turbo Obelisk’ varieties and new cultivation technologies
    XV World Forestry Congress, 2-6 May 2022
    2022
    Also available in:
    No results found.
    After decades of research and development, Silvanus Forestry Ltd. and HungaroPlant Ltd. have successfully propagated the Robinia pseudoacacia ‘Turbo Obelisk’ variety group and developed the necessary cultivation technologies, specifically for intensive industrial wood production plantations. In comparison to the Hungarian and traditional black locust varieties and cultivation technology, industrial wood production plantations established with our variety group and using our cultivation technologies can produce twice as much timber yield and industrial timber yield, considering 15-year rotation periods. These parameters are comparable with the performance of the widespread Eucalyptus and Pinus plantations in the subtropics. Our varieties and cultivation technologies, however, are also usable in subtropical, temperate, as well as tropical climates. The outstanding yields achieved by the ‘Turbo Obelisk’ varieties and the extremely high industrial wood output can provide a significant contribution to the conservation and maintenance of natural ecosystems, whilst the CO2 sequestration per unit area per time is also several times that of natural forests. A particular advantage to emphasize is long term carbon sequestration due to the high percentage of industrial wood yield. Increasing the exceptional tolerance of black locust against drought, pollution and low-quality soils, our varieties are exceptionally suitable for the utilization of marginal agricultural areas, the agricultural utilization of which would otherwise create an economical loss. This can also significantly increase the advancement of less developed regions. In addition to plantation cultivation, it also provides a cost-effective solution for the establishment of protective forest belts, road-side plantings, quicksand fixation and soil renovation. Delicious honey production is also a possible revenue stream. The global exploitation of the research findings has begun, having already successfully established test plantations in China, India, and Pakistan, as well as in several European countries. Keywords: dry agricultural areas, micro-propagated black locust varieties, ‘Turbo Obelisk’, carbon sequestration ID: 3484660
  • Thumbnail Image
    Document
    Current situation of preserved wood market in Republic of Korea
    XV World Forestry Congress, 2-6 May 2022
    2022
    Also available in:
    No results found.
    In Republic of Korea, in order to establish a distribution order for wood products and to use them safely, 15 wood products prescribed by 'Act on The Sustainable Use of Timber' law are under quality control.
    Among them, preserved wood is a product produced to increase the durability and economic value of wood. Preserved wood treated with copper compound-based preservatives such as ACQ and CUAZ is mainly used. In Korea, it is mainly used for decking(50.9 %) and landscaping(24.1 %), and about 95% of the used preserved wood is H3 grade. The preserved wood market is showing a decreasing trend every year, and it decreased to about 50% in 2019 compared to 2016.
    In order to confirm the reason for the decreasing steadily of the market for preserved wood in terms of quality, we will analyze the current situation such as quality changes based on the test analysis results conducted by the Korea Forestry Promotion Institute for the past 5 years, and review the areas for improvement. Keywords: Monitoring and data collection, Research ID: 3623003
Show more

Users also downloaded

Showing related downloaded files

No results found.