. Bulletin. Natural history; Natural history. June, 1955 Curl: Oak Wilt Inocula 303 cuts to distances up to 2 feet back under the intact bark. Such patches of mycelium sometimes measured as much as 8 inches in width. Wound-stimulated mycelial growth was most prevalent during April and May. On any tree that had the fungus odor beneath the bark, macroscopic growth could be induced to form merely by lift- ing a section of bark and immediately nailing it back in place. From the trunk of felled tree R-7, six pieces of bark, each measuring approximately 8 by 12 inches, were lifted. On two of the are
. Bulletin. Natural history; Natural history. June, 1955 Curl: Oak Wilt Inocula 303 cuts to distances up to 2 feet back under the intact bark. Such patches of mycelium sometimes measured as much as 8 inches in width. Wound-stimulated mycelial growth was most prevalent during April and May. On any tree that had the fungus odor beneath the bark, macroscopic growth could be induced to form merely by lift- ing a section of bark and immediately nailing it back in place. From the trunk of felled tree R-7, six pieces of bark, each measuring approximately 8 by 12 inches, were lifted. On two of the areas from which the bark had been lifted, the bare wood was covered with thin plastic, and the bark was replaced and nailed down securely. On two other areas, the inner bark surfaces were covered with plastic and nailed back over the wood. On two other areas the bark pieces were only lifted and immediately nailed back in place. On the areas where the wood was cov- ered with plastic, abundant growth of Endoconidiophora fagacearum appeared within 2 weeks on the under side of the bark only. Two weeks later this growth was old, but still no mycelium had formed on the plastic-covered wood beneath. On the areas which had the inner surface of the bark covered, growth appeared on both bark and wood, more abundantly on the covered surface of the bark than on the wood. On the areas where bark was simply lifted and replaced, good growth occurred on both bark and wood surfaces. Similar results were obtained on felled tree R-8 and on several standing trees. Wounding not only stimulated free mycelial growth, but it also often hastened the development of typical mats with pads. For typical mats to appear adjacent to previously made cuts was common during April and May. In many cases the pads pushed the bark out at the edges of the cuts, exposing the mats to the outside. Also, mats appeared first on some trees at points where large nails had been driven through the bark in the process of buildin
Size: 2071px × 1206px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
