dc.contributor.author |
Shanbhag, R.R. |
|
dc.contributor.author |
Murthy, N. |
|
dc.contributor.author |
Mohanty, B.N. |
|
dc.date.accessioned |
2019-01-11T07:38:54Z |
|
dc.date.available |
2019-01-11T07:38:54Z |
|
dc.date.issued |
2018-11 |
|
dc.identifier.citation |
Shanbhag, R.R., Murthy, N., Mohanty, B.N. (2018). "Antifungal Activities of Selected Plant Extracts against Wood Rotting Fungi: A Challenge in Panel Wood Products", Proceedings of the 23rd International Forestry and Environment Symposium 2018 of the Department of Forestry and Environmental Science, University of Sri Jayewardenepura, Citrus Waskaduwa, Waskaduwa, Sri Lanka, 84 p. |
en_US |
dc.identifier.issn |
2235-9427 |
|
dc.identifier.uri |
http://dr.lib.sjp.ac.lk/handle/123456789/8188 |
|
dc.description.abstract |
Fungal infection to wood and panel product is a major economic concern for the building industry as it
causes heavy losses of wood used in the construction. It is imperative to take the necessary steps to
preserve the wood and the wood products. Due to growing concerns about the adverse effects of chemical
preservatives on human health as well as environmental concerns had made the consumer look for
alternatives. Hence an ideal compound for wood protection for interior applications which is non-toxic
and able to provide long-term efficacy is increasingly being sought. As result, many plants are screened
and their extractives were getting evaluated for their ability to inhibit fungal infection on wood. However,
there is a lack of literature on the utilization of these bio based preservatives as the fungal inhibitor in
wood composite panels. A study in this line is very important as challenges involved with of bio-based
wood preservative for panel wood are totally different. Botanical preservative which is highly effective in
wood may not be suitable for the panel wood products. Some modifications and incorporations are vital to
use this bio-based preservative in the wood composite material. The objective of this paper is to
investigate the fungal inhibitory effects of some natural plant extracts mixture, on wood panels and
differences in their performances along with an obstacle faced in case of panel woods. For the purpose,
extract of Lantana camara L., Ricinus communis L. Catharanthus roseus (L.) G. were prepared using
water and petroleum ether as solvents by standard procedure. Amount of extractives obtained were
quantified for each plant species. Extractives formed were range from 11-68-14.33 for different plant
species. Extracts obtained from different plant were mixed to form a synergetic preservative and same
was mixed in PF and UF resin at different concentrations (1%, 1.5%, 2%, 5% and 10%) and plywood
samples were prepared using rubber wood veneers. Control panels were also prepared with PF and UF
resins without extractives. From these panels experimental blocks were prepared and introduced in Kolle
flask, containing test fungi Polyporous meliae and Trametes versicolor along with the control samples.
Whole experimental setup was kept at room temperature (25±5o C) with 60-70% relative humidity. After
the completion of an experiment, samples were removed from the Kolle flask and myceliums adhering to
test samples were cleaned by taking care not to remove the splinters of the samples. Blocks were dried in
an oven and final weight was taken. Mean percentage weight loss was calculated, which varied from 8-
25% for different test samples. Result revealed that, Minimal fungal inhibitory effect was seen even at 1%
concentration and as concentration increased resistance also increased. But at higher concentrations of
extractives in glue line negatively affected the important physical and mechanical properties of panels.
Hence it is important to determine an optimal extractive concentration to achieve the best possible result
as the bio based preservative that too without affecting the bonding strength of the plywood. Thus we can
conclude that incorporating with slight modifications effective eco-friendly wood preservatives can be
prepared by utilizing these plant extractives. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
University of Sri Jayewardenepura 2018 |
en_US |
dc.subject |
Fungal wood decay, Bio-control, Plant extracts, PF and UF resins |
en_US |
dc.title |
Antifungal Activities of Selected Plant Extracts against Wood Rotting Fungi: A Challenge in Panel Wood Products |
en_US |
dc.type |
Article |
en_US |