Eutypella parasitica R.W. Davidson & R.C. Lorenz is the causative agent of Eutypella canker of maple, a destructive disease of maples in Europe and North America. The fungus E. parasitica is known to cause wood stain and decay. However, it is not known how effectively it decomposes the wood of the most widespread maple species in Europe. Wood samples of Acer pseudoplatanus L., A. platanoides L., and A. campestre L. were exposed to four isolates of E. parasitica and nine other fungal species for comparison, according to the modified EN 113 standard. After 15 weeks of incubation, mass loss and microscopical analysis of samples showed evidence of colonization and different wood decay potentials among fungal species. A highly significant positive correlation was found between mass loss and moisture content for all fungal species. Similarly, the measured cell wall thickness correlated well with the calculated mass loss of the samples. On average, the fungal species caused the lowest mass loss in A. pseudoplatanus (10.0%) and the highest in A. campestre (12.6%) samples. Among the samples exposed to E. parasitica isolates, the highest mass loss was recorded in A. pseudoplatanus (6.6%). Statistical analysis showed significant differences in mass loss and moisture content between different E. parasitica isolates. Based on the results of staining, we discuss the type of decay caused by E. parasitica. Although E. parasitica isolates caused smaller mass loss of samples compared to other more effective decay species, we should not disregard its capability of degrading maple wood. Because E. parasitica usually infects the lower portion of the trunk, which is the largest and most valuable part of the tree, any damage can cause significant economic and resource loss.

中文翻译：

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寄生大叶黄杨对三种枫木木材腐烂的影响

Eutypella parasitica RW Davidson和RC Lorenz是枫叶Eutypella溃疡的病原体，枫叶是欧洲和北美的破坏性疾病。真菌E.寄生已知会导致木材着色和腐烂。但是，尚不清楚其如何有效分解欧洲最广泛的枫树种的木材。的木材样品宏基pseudoplatanus L.，A. platanoides L.，和A.坎佩斯特里L.暴露于的4株E.寄生并根据修改后的EN 113标准对其他9种真菌进行比较。孵育15周后，样品的质量损失和显微镜分析显示了真菌物种中有定植和不同的木材腐烂潜力的证据。在所有真菌物种的质量损失和水分含量之间发现高度显着的正相关。同样，测得的细胞壁厚与计算出的样品质量损失相关性很好。平均而言，真菌种类在假铂拟南芥中造成的质量损失最低（10.0％），在campestre样本中造成的质量损失最高（12.6％）。在暴露于寄生性大肠杆菌的样品中，最大的质量损失记录在假铂假丝酵母中。（6.6％）。统计分析表明，不同的寄生性大肠杆菌分离物在质量损失和水分含量方面存在显着差异。基于染色的结果，我们讨论了由寄生性大肠杆菌引起的衰变类型。尽管与其他更有效的腐烂物种相比，寄生寄生大肠埃希菌引起的样品质量损失较小，但我们不应忽视其降解枫木的能力。由于寄生寄生性大肠杆菌通常会感染树干的下部，树干下部是树的最大，最有价值的部分，因此任何破坏都可能造成重大的经济和资源损失。