![]() ![]() There have been instances where detection of this pathogen has been found on bigleafs that offer many of the symptoms described by the OP. ![]() They are also a host plant for Phytophthora ramorum or Sudden Oak Death. Armillaria root rot is rather common and will lead to the eventual decline and death of very mature trees. Exposed storm damage can lead to pathogenic invasion. Our native maples are susceptible to certain diseases and tend to be easily damaged by winter storms. And one must approach this issue with some degree of common sense - not too many bigleaf maples are intentionally planted, most occur naturally and not always on private property, so going out and hand watering these trees is a bit silly, don't you think? tree has no doubt gone through many much worse than the last couple of seasons. This is NOT a new phenomenon - parts of the PNW regularly experience some very dry summers and a 60 y.o. Acer macrophyllum is a native species and well adapted to our climate including our recurring periods of summer drought. It is a worry though.ĭrought stress? Probably not. I've been complaining about this lousy summer, but perhaps there has been less hot weather and more rain so the trees might have a chance to survive. I believe though (without any expert telling me) that the past few summers have been very warm and dry, more so than usual, and the trees have been badly stressed. There is no way we can control the moths, the trees are much too big. We get that winter moth in the trees and right now the leaves are quite lacy with the larvae from the moths. Another friend of ours had one split in two unexpectedly - luckily no one was under it, so there is good reason to worry about these trees. They have done this with a neighbours tree and it has come back very well. They are going to take the top off the tree and hopefully it will sprout from the trunk - sort of pollarding in a big way. We had the tree men here on Friday and are having them back. One in particular is brown in the top, all the way down to the trunk. There are 5 big leaf maples alongside our driveway and they all look unhappy. Has anybody heard of a disease that would be that devastating? (in the PNW), or have any idea what is happening? It looks like a systemic disease like a "wilt" to me. As I am sitting here I am looking out the window at my neighbor's tree that looks absolutely awful, not long for this world if he is correct. One of them is showing these same signs at the top. ![]() ![]() plus, 60' plus) big-leafs that I cherish. Our house sits surrounded by seven huge (200 yr. There was also a very heavy seed load on the tree. The lower portion also looked very distressed. The top portion of the tree was covered with smaller (half-size or less) leaves that were brown or close to it, and many of the leaves had fallen prematurely. This absolutely sent chills down my spine. Then he pointed out a tree next to it and said "you see that, it will be dead next year". We got into a dscussion about it and he explained that the tree had declined rapidly last year and a large portion had broken out of the center, so he had to take it down as a safety measure (this was a tree at least 60' tall). I recently went to a nursery near my home where the owner pointed out a large big leaf maple (Acer macrophyllum) that he had just taken down. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |