Earticle

초록

영어

The increasing concern by the public regarding the environmental impacts associated with the utilization of synthetic preservatives continues to propel the search for environmental benign alternatives. Therefore, this study investigated the efficacy of Azadirachta indica and Kigelia africana leaves extracts in the protection of Triplochiton scleroxylon wood against fungal decay. The dried leaves of both plants were pulverized and six extracts were prepared: Aqueous Kigelia extract (KW), Ethanolic Kigelia extract (KA), Aqueous Azadirachta extract (AW), Ethanolic Azadirachta extract (AA), 1:1 KW to AW (KAW), 1:1 KA to AA (KAA) using distilled water and 100% ethanol as the diluent. T. scleroxylon blocks of dimension 2 cm×2 cm×6 cm were oven-dried and soaked in each extract for 24 hrs, with water (CW) and ethanol (CA) serving as control. Parameters observed include extract yield, colour changes, extract absorption and retention. The treated woods were inoculated with the fungi Pleurotus ostreatus (white rot) and Aspergillus niger (brown rot) for 12 weeks after which their weight loss was determined. Data analysis was conducted using ANOVA at 5% probability level. The extract yield ranged between 1.20%-8.73%. Wood samples treated with the AW extract had the highest absorption (31.26 kg/m3), while extract retention was highest in both KA and AA (3.7 kg/m3). Colour changes, particularly in the samples treated with the aqueous extracts, was noticeable. Highest weight loss was observed in both CA (43.81% and 46.45%) and CW (50.23% and 51.11%), while KW (9.33% and 12.01%) treated samples had the lowest weight loss after exposure to P. ostreatus and A. niger, respectively. Synergistic effect of both extracts was significant on the absorption, retention and weight loss of the wood samples exposed to fungi. It was concluded that KW extract is the most effective in protecting the wood against fungal decay.

목차

Abstract
Introduction
Materials and Methods
Preparation of wood test blocks
Preparation of A. indica leaf extracts
Preparation of Kigelia leaf extracts
Yield estimation of extracts
Fungicide formulation
Growth medium preparation
Treatment of test blocks
Colour assessment of test blocks
Inoculation and incubation of test blocks
Weight loss determination
Data analysis
Results
Yield of extracts
Colour changes in wood samples
Absorption and retention of preservative extracts by wood samples
Weight loss of wood samples after exposure to fungi
Discussion
Extract yield of the plant species
Colour changes in the treated wood samples
Extract absorption and retention by the wood samples
Decay resistance of the wood samples
Conclusion
Acknowledgements
References

키워드

저자

• Adewunmi Omobolaji Adenaiya [ Department of Forest Production and Products, University of Ibadan 200284, Nigeria ] Corresponding Author
• Oloruntomi John Adesina [ Department of Forest Production and Products, University of Ibadan 200284, Nigeria ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  Journal of Forest and Environmental Science [산림과학연구]

• 간기

  계간

• pISSN

  2288-9744

• eISSN

  2288-9752

• 수록기간

  1981~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 526 DDC 634