COLONIZATION BY DECAY FUNGI OF LIVING AND DEAD STEMS OF BALSAM FIR FOLLOWING ARTIFICIAL INJURY

1963 ◽  
Vol 41 (10) ◽  
pp. 1532-1534 ◽  
Author(s):  
D. E. Etheridge ◽  
L. A. Morin
Keyword(s):  
Balsam Fir ◽  
Decay Fungi

THE MICROBIOLOGICAL CONDITION OF WOOD OF LIVING BALSAM FIR AND BLACK SPRUCE IN QUEBEC

1967 ◽  
Vol 45 (7) ◽  
pp. 1003-1010 ◽  
Author(s):  
D. E. Etheridge ◽  
L. A. Morin
Keyword(s):  
Standard Method ◽  
Black Spruce ◽  
Balsam Fir ◽  
Sampling Techniques ◽  
Ecological Studies ◽  
Decay Fungi ◽  
The Past ◽  
Negative Results ◽  
Low Activity ◽  
Standard Techniques

Determinations of bacterial and fungal microfloras were made on 2% malt agar slants from wood samples of a living balsam fir, by following standard techniques for the isolation of decay fungi. Comparative studies with other microbiological sampling techniques and with different media have demonstrated (i) the general suitability of the standard method for ecological studies of wood-inhabiting microorganisms, and (ii) the validity of negative results obtained in previous isolation studies with the standard method. These findings reveal the pith column as a major center of bacterial activity in balsam fir, with relatively low activity recorded for the heartwood, and none at all in the sapwood. There is evidence that a similar situation exists in living black spruce, although the level of microbiological activity was much lower in the heartwood of this species, and bacteria almost nonexistent. Isolation studies conducted over the past 3 years in Quebec revealed that 40% of 132 living balsam fir trees and over 90% of 42 living black spruce trees sampled had sterile heartwood and sapwood. Retinocyclus abietis (Crouan) Groves and Wells was the only fungus isolated from both heart-wood and sapwood of the two species.

Inhibition of Root- and Butt-decay Fungi by Extractives of Balsam Fir Root Wood

1974 ◽  
Vol 4 (2) ◽  
pp. 213-221 ◽  
Author(s):  
Thomas E. Sterner
Keyword(s):  
Neutral Fraction ◽  
Balsam Fir ◽  
Decay Fungi ◽  
Chloroform Extraction

Growth of the root- and butt-decay fungi, Coniophoraputeana, Polyporusbalsameus, Scytinostromagalactinum, and Odontiabicolor, was significantly less on root centerwood than on stem heartwood of balsam fir. Also, root centerwood was much more resistant to decay than was stem heartwood. The inhibitory properties of the root wood were markedly reduced by chloroform extraction, and the concentrated extracts inhibited the growth of the decay fungi. Through bioassay, most of the inhibition was found to be attributable to four of the several spots appearing on chromatograms of the extract neutral fraction.

Effectiveness of Neem (Azadirachta indica A. Juss) Oil against Decay Fungi

2017 ◽  
Vol 5 (1) ◽  
pp. 48-51 ◽  
Author(s):  
Kanchan Rawat ◽  
◽  
Uttam Kumar Sahoo ◽  
Nagaraj Hegde ◽  
Awadhesh Kumar ◽  
...  
Keyword(s):  
Azadirachta Indica ◽  
Schizophyllum Commune ◽  
Antimicrobial Properties ◽  
Fusarium Proliferatum ◽  
Wood Preservatives ◽  
Neem Oil ◽  
Environment Friendly ◽  
Decay Fungi ◽  
Natural Oils ◽  
Mycelia Growth

The enormous use of metallic wood preservatives has caused destructive impact on environment as well as human health. Therefore realizing the urgency of switching to Environment friendly options such as natural oils are being tested for their antimicrobial properties. The present study aimed at investigating potential of Neem oil against the growth ofdecaying fungi. The ability of Neem oil to inhibit mycelia growth of Schizophyllum commune, Fusarium oxysporum, Fusarium proliferatum, Coniophora puteana and Alternaria alternata was tested at different concentrations of 0.25, 0.50, 0.75, 1.0, 2.0, 4.0, 6.0, 8.0 and 10%. Results of the study revealed Neem oil concentrations above 2% were significantly inhibitory to all the tested fungi.

scholarly journals Predicting balsam fir mortality in boreal stands affected by spruce budworm

2021 ◽  
Vol 496 ◽  
pp. 119408
Author(s):  
Djidjoho Julien Houndode ◽  
Cornelia Krause ◽  
Hubert Morin
Keyword(s):  
Spruce Budworm ◽  
Balsam Fir

Growth behavior of wood-destroying fungi in chemically modified wood: wood degradation and translocation of nitrogen compounds

Holzforschung ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Lukas Emmerich ◽  
Maja Bleckmann ◽  
Sarah Strohbusch ◽  
Christian Brischke ◽  
Susanne Bollmus ◽  
...  
Keyword(s):  
Protective Action ◽  
Treated Wood ◽  
Untreated Wood ◽  
Brown Rot ◽  
Decay Resistance ◽  
White Rot ◽  
Decay Fungi ◽  
Chemically Modified ◽  
Decay Tests ◽  
Modified Wood

Abstract Chemical wood modification has been used to modify wood and improve its decay resistance. However, the mode of protective action is still not fully understood. Occasionally, outdoor products made from chemically modified timber (CMT) show internal decay while their outer shell remains intact. Hence, it was hypothesized that wood decay fungi may grow through CMT without losing their capability to degrade non-modified wood. This study aimed at developing a laboratory test set-up to investigate (1) whether decay fungi grow through CMT and (2) retain their ability to degrade non-modified wood. Acetylated and 1,3-dimethylol-4,5-dihydroxyethyleneurea (DMDHEU) treated wood were used in decay tests with modified ‘mantle specimens’ and untreated ‘core dowels’. It became evident that white rot (Trametes versicolor), brown rot (Coniophora puteana) and soft rot fungi can grow through CMT without losing their ability to degrade untreated wood. Consequently, full volume impregnation of wood with the modifying agent is required to achieve complete protection of wooden products. In decay tests with DMDHEU treated specimens, significant amounts of apparently non-fixated DMDHEU were translocated from modified mantle specimens to untreated wood cores. A diffusion-driven transport of nitrogen and DMDHEU seemed to be responsible for mass translocation during decay testing.

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