And Now They Have Come For My Ash Trees
acadiafun1
7 years ago
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wisconsitom
7 years agoacadiafun1
7 years agolast modified: 7 years agoRelated Discussions
2 young ash trees, emerald ash borer getting close replace them?
Comments (12)mdo, I can shed a little light on this: With the Emamectin Benzoate-style treatments available now, tradenamed Tree-age (The 'a' has the two little umlauts or whatever they're called above it, and the word is pronounced like the word triage), it is reasonable to expect two solid years of control from a single treatment, and quite possibly three years. For high-value trees like yours, this seems like a reasonable thing to do. Alternatively, the Imidacloprid insecticides will give a single year's control but are easier to apply. So even that's not a crazy thing to do. Environmentally speaking, either one of these methods is fairly low risk to surrounding organisms, being either injected straight into the trunk, or spread on the ground and soaked in via watering or rainfall, depending on which chemistry you reach for. The other half of your question I can answer too: What seems to happen with EAB is similar to other exotic insect invasions-there is a ramping up period, a period of overwhelming infestation, and then, just as you'd probably expect,a leveling off period after the insects have killed most of their hosts. So if you do happen to save yours during the hot time, you would still need to treat to have the surety of protecting the trees, but overall pressure would level off a great deal. These two lines of thought are straight out of very recent arborist's convention/seminars, so they are up to date. The relevance of this winter's cold temps was also a hot topic (Buh dum bum), but in reality, most thought is that while some of the less-deeply positioned larvae may indeed be killed, EAB has two larval forms and one of them is positioned deeper into the trunk, likely meaning the weather will have fairly little impact one way or the other. We can always hope though! +oM...See MoreBorers branch out from ash trees (EAB attacking fringetrees now)
Comments (1)We previously had a discussion on this a couple weeks ago. I linked the topic below. My concern is EAB prefers ash but might have some other trees it also will feed on like fringetree. Once EAB eradicates the ash trees, they will then move on to their second tier choices and then cause their numbers to decline. Don't forget at this point of ash decimation, EAB numbers will be very high! There is still much research to be done with this of course and it may not end up much of an issue at all for species other than ash. Here is a link that might be useful: Recent previous discussion...See MoreI think my Green Ash tree might have the Emerald Ash Borer
Comments (10)The other problem with this tree is a rather large vertical crack starting from the ground and going right up. It's a frost crack - has been there for at least 2 years that I've noticed. From what I read, frost cracks on ash trees don't necessarily kill a tree but do give bugs an opportunity to crawl in there. After Rick's suggestion that it might be another borer, which I hadn't considered, I read about the Redheaded Ash Borer and the Banded Ash Clearwing Borer, native pests that attack ash trees. I'm quite certain there's something buggish in that tree, based on the woodpecker activity which is almost constant. I'm also thinking this tree is a goner - perhaps not from EAB but something else, slowly but surely. I'll still check it closely - I got some plants from southern Ontario a couple of years - is it possible for EAB to have travelled that way? Those plants are now planted right near that ash tree but that's got to be a stretch, no? Having to remove the tree will affect some plants that now benefit from the midday shade it provides (but they can be easily moved). Having to remove it will mean less ash seeds. Having to remove it give me the opportunity to plant something new there, and that's okay with me....See Morei might have one of the largest/oldest ash trees in scotland
Comments (3)Sorry if this fact changes your trees stats. With a co-dominant stemmed specimen like yours thats open grown compared to one continuous trunk example in forest. First measure each diverging trunks lower diameter, then determine average between both. Take that figure and divide by pie 3.1 to determine DBH. But now if your double trunked tree was produced by coppice stump shoot regrowth. Root system could be older, research coppice stool width to estimate age. No doubt since Scotts Ash very similar to our Green Ash, like Elm they mature between ages 180-220, and 1 out of four live 300 years and more. Coppiced ones in UK over 1500 yr old rootsystems! Here is link to my blog including photos of chicago's oldest ashes I have protected against EAB. https://scottieashseed.wordpress.com/...See Morebengz6westmd
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