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| pdf attached..
i looks to me.. like a powerpoint presentation ... this is what i mean with 'in as few words as possible' ... it gives me a window of time to avoid ... and a brief overview of the issue ... for you pro's ... tom??? [lol] ... what do you make of the basic information given ... anything worth arguing about??? left out??? ken |
Here is a link that might be useful: link
Follow-Up Postings:
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| Unfortunately this is the reason I only have Q. alba and bicolor in my landscape. It really shouldn't be a reason to not plant oaks but a reason to diversify. There are many many oaks in the wooded areas adjacent to my property as well. |
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| It is shown to be here in Pa. I haven't seen any evidence of it in my immediate area. I hope it stays that way. I wonder if Quercus Alba and Q. Bicolor being less suseptible means other "white oaks" last longer than "red oaks". Well, if Live oaks are sucumbing I guess not. I am surprised Live oak is suseptible and Q. Alba isn't so much. I would think they are both genetically similar. That's my unscientific thoughts on the subject. If my oaks get hit I'll have only 10 oaks left ( Alba and Bicolor ), that'll suck big time. |
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- Posted by ken_adrian z5 (My Page) on Wed, Jun 13, 12 at 9:54
| hear the echo while you read.. toooommm ... toooommm.. arrreee yyyooouuu oouuuttt thhheeerree??? tom??? [lol] ... what do you make of the basic information given ... anything worth arguing about??? left out??? ken |
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| Ken, the link you posted has generally good info, but the 2nd to last page has a photo of a sign that says "don't prune in May or June". That warning should be expanded to include any time of the year that the insect vectors (picnic beetles) may be active. See link below for more up to date info. |
Here is a link that might be useful: oak wilt
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| From what I see, although oak wilt is a big problem, it's more "patchy" in it's effects, not widespread like DED and Chestnut Blight. Let's hope it stays that way. |
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- Posted by wisconsitom 4/5 WI (My Page) on Fri, Dec 21, 12 at 17:42
| Geez, can't a guy even trade in "old blue", a 1995 Astro van with well over 200,000 miles on it but which finally blew its tranny-for a sleek, totally clean used Toyota 4-Runner, without getting yelled at by Ken? No, he can't! Info is solid though as some have pointed out, even in MI, the endpoint of the 'do not prune, etc.' period can and probably should be moved to August just to be on the safe side. Now Ken, not sure if you've ever enjoyed a beer out in the yard, but if you have, you've probably seen the main insect vector, the picnic beetle, maybe even spitted one or two out of your mouth. They love yeasty, fungusy smells and this is relevant as it is the smell of the fungus itself, which if present on an oak that has been pruned or otherwise wounded, attracts them. More often though, the pathogen moves from tree to tree via root grafts. This as much as anything accounts for its patchy nature. Some arboricultural firms have been offering to severe these root grafts between oak trees with a machine called a 'vibratory plow'. That is one of the means by which an oak near to another oak with the disease may be spared. For that matter, the pathogen responsible for oak wilt is a kissing cousin to that responsible for Dutch elm disease and the latter also used root grafts to move from elm to elm down many a city street terrace. Resistant trees-those in the white oak group-still can be infected but for some reason are much more able to overcome its effects. Obviously, the ultimate answer is to plant only maples! Ha...couldn't resist! +oM |
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| I kinda wonder if (besides not pruning in late winter and early Spring) using prune sealer, you know, the black rubbery tar stuff, would help the tree from pruning site attack. If they are attracted to the pruned area, could that help? I suppose that any reply would be a WAG, unless someone has tried it before. |
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- Posted by wisconsitom 4/5 WI (My Page) on Sun, Dec 30, 12 at 23:59
| Some arborists consider spring/summer wounds or unavoidable pruning cuts on oaks to be one exception to the general practice of not using any wound dressing or tree paint. I'd roughly fall into that group. Sometimes in the spring, some trees are so oozing with sap that it can become impossible to apply anything on a wound as it will not stick. +oM |
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