Decay resistance of scotch pine wood impregnated with Agaricus campestris bio-protective extract

Abstract

In this study, it was investigated the possibilities of the use of fungal extract as wood protection solution against wood-degrading fungi. For that purpose, the decay resistance of Scotch pine wood samples, impregnated with Agaricus campestris fungal extract, was observed against the brown rot fungus Coniophora puteana. Impregnation procedure was applied at four different concentration levels and with two different extraction methods (hot water and methanol). The concentration levels were arranged as 1%, 3%, 5%, 7% for hot water and as 1,25%; 3,75%; 6,25%; 8,75% for methanol. The wood protective efficacy of extract solutions was determined by means of fungi decay test. The mass losses of the samples treated with both fungal extracts ranged from 3,53 to 20,91. The lowest mass losses in hot water (4,57%) and methanol extractions (3,53%) were seen in the samples treated at the highest concentration levels (7% and 8,75%). The wood samples impregnated at 7% and 8,75% concentration levels met the requirements of durability class 1 and were classified as very durable. Antifungal activity of methanol extract was stronger than that of the hot water extract. The variations which concentration levels were less than 7% did not have adequate protection to meet the requirements of the European norms.

Evaluation of fungicidal effects of post-culture medium of selected mold fungi and bacteria in relation to Basidiomycetes fungi, causing wood destruction

“…In the case of the C. puteana fungus, statistically significant differences in growth compared to the control sample were found on a medium containing 15% and a higher concentration of post-culture medium. Similar analyzes of the effect of fungal extracts on the growth of C. puteana were conducted by Yildiz et al (2019). The fungicidal effects of fungal extracts on many saprophytic and parasitic fungi have been studied by Okeke et al (1992), Sudirman et al (1992), and Highley (1997).…”

Epsilon poly-L-lysine as a novel antifungal agent for sustainable wood protection

“…For example, 50% toughness loss was observed when wood samples lost 1% weight loss (Richards, 1954 ), and 10% reduction in compressive strength when wood samples lost 2% of weight (Mizumoto, 1966 ). Approaches to protecting wood from various fungal damage include non-fungicidal (Guo et al, 2018 ), fungicidal (Cai et al, 2020 ), and biological methods (Yildiz et al, 2017 ). In particular, chemicals (i.e., copper-based wood preservatives) used in fungicidal formulations have been challenged by the ever increasing antimicrobial resistance of the fungi (Tang et al, 2016 ), strict environmental regulations (Adam et al, 2009 ), and the growing awareness of sustainable alternatives (Dong et al, 2020 ).…”