| Volume: 8; Issue: 2; December 2026 |
|---|
| Title : EVALUATION OF BIFENTHRIN, FIPRONIL AND DDAC FOR PROTECTION OF RUBBER WOOD VENEER AGAINST SAP-STAIN FUNGI AND SOLID WOOD AGAINST DECAY BY TRAMETES HIRSUTA |
| Authour(s): S. Srushti, C. Nanditha, H.M. Sadiqha Khanum, B.S. Jyothsna and Rashmi Ramesh Shanbhag |
| Keywords: Bifenthrin, DDAC, Fipronil, Sap-stain fungi, Trametes hirsuta, Wood preservation. |
| Abstract: Wood deterioration caused by sap-stain and decay fungi reduces the aesthetic, structural, and commercial value of wood products. This study evaluated the efficacy of bifenthrin (3%), fipronil (3%), and Didecyldimethylammonium chloride (DDAC, 3%) in protecting rubber wood (Hevea brasiliensis) veneer and solid wood. Specimens were dip-treated for 24 and 48 h, and preservative retention was determined according to IS 4873 (Part I): 2008. Sap-stain resistance was assessed under accelerated humidity-chamber conditions, while decay resistance against Trametes hirsuta was evaluated using the Kolle flask method. DDAC-treated veneer showed the highest preservative retention (0.84-0.93 kg m⁻³) and the lowest fungal colonization (approximately 8-9%), providing more than 85% protection over untreated controls. Fipronil exhibited moderate-to-high resistance, restricting colonization to 24- 29%, whereas bifenthrin was comparatively ineffective (approx. 74% colonization). Untreated wood recorded the greatest mean weight loss (34.75 ± 11.04%), while DDAC-treated wood showed the lowest losses (8.12-8.46%), followed by bifenthrin after 48 h of dipping (8.80%). Treatment effects were highly significant (P < 0.001). Retention showed a negligible relationship with weight loss (R² = 0.0007; n = 36), indicating that preservative chemistry largely determined antifungal performance. Overall, DDAC was the most effective preservative for rubber wood protection |
| DOI: https://doi.org/10.46505/IJBI.2026.8209 |
| How to cite this article: Srushti S., Nanditha C., Khanum H.M.S., Jyothsna B.S. and Shanbhag R.R. (2026). Evaluation of Bifenthrin, Fipronil and DDAC for protection of rubber wood veneer against sap-stain Fungi and solid wood against decay by Trametes hirsuta. International Journal of Biological Innovations. 8(2): 222-228. https://doi.org/10.46505/IJBI.2026.8209 |
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