andosca
ArboristSite Guru
i'm planning of planting a bunch of trees on my property. i like ash but wasn't sure what kind of progress, if any they were making, in fighting the EAB. i live in NH, what say all ye experts on such things?
should i plant ash?
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Emerald Ash Borer is moving 40(ish) miles per year, with no sign of slowing down.
No.
No.
andosca
ArboristSite Guru
how far east is it now?
woodbooga
cords of mystic memory
A member from KY posted recently it was there. You need to also be wary of the Asian longhorn beetle, which has been wreaking havoc in the Worcester area and has possibly been transported across the border by 2nd homeowners and campers bringing firewood northward.
moss
ArboristSite Guru
TDunk
Addicted to ArboristSite
The forestry has traps set but nothing yet that i've heard.
How far east is or how far is it known? I think most experts would agree that those are 2 different questions. Obivously one is answerable with facts, the other is just guessing:
Here is a map from APHIS showing known finds as far east as central PA, and SW Maryland & NE Virginia. Oh...and don't forget to look Up North (in Quebec).
andosca
ArboristSite Guru
does it kill all types of ash? are they working on any hybrids or something that might not be affected by the insect?
I haven't seen anything for over a year, but last I heard:
It would seem that it will infest any Fraxinus species. There is experimentation with Manchurian ash. In their native environment, they are not killed by EAB. However, when they were planted in heavily infested areas, many (but not a majority) are still being killed - the theory is that do have some natural resistance but even their natural resistance can't stand up against that much pressure or maybe additional stressors are helping kill some of the trees. I haven't heard anything promising enough to convince me to plant Manchurian ash...but that could change?
It would seem that it will infest any Fraxinus species. There is experimentation with Manchurian ash. In their native environment, they are not killed by EAB. However, when they were planted in heavily infested areas, many (but not a majority) are still being killed - the theory is that do have some natural resistance but even their natural resistance can't stand up against that much pressure or maybe additional stressors are helping kill some of the trees. I haven't heard anything promising enough to convince me to plant Manchurian ash...but that could change?
Does any one know how to store the seeds from ash trees, so they can be germinated later?
I thought I might try to save some seed. Then if a biological control is found in a few years the saved seeds could be planted then.
I thought I might try to save some seed. Then if a biological control is found in a few years the saved seeds could be planted then.
hokiewheeler
ArboristSite Lurker
I wouldn't recommend planting in a forest environment. I don't even recommend it as a landscape tree, because even if you commit to a religious treatment schedule forever, the pest might still get in, and then you're out the tree, out the money you spent treating it, and out the cost of the removal. Unfortunately, you can't really plant ash anymore. I'm curious to see what the beetle attacks when it runs out of ash.
arbor pro
Addicted to ArboristSite
You can download the multistate eab quarantine map at:
http://www.aphis.usda.gov/plant_health/plant_pest_info/emerald_ash_b/downloads/multistateeab.pdf.
We just had a seminar on eab last week. It affects all fraxinus. Kills them within a year or two of infestation - entire communities of ash dead.
do not plant ash at this time. Also, treatments for eab are not affective until eab arrives in your area. Some treatments for eab can have a 'viagara' effect on other ash problems such as scale. Treatments also are likely only going to prolong the life of an ash for a few years as they become less effective on adult eab over time.
Bad news for communities with lots of ash.
Only glimmer of daylight is that some secluded populations of ash may survive as the adult borers do not fly well and are typically transported through the movement of firewood or on vehicles. EAB typically shows up in a new area in campgrounds and along transportation networks (railroads, highways). If the eab doesn't get moved into an area by either of those two means, the ash may have a glimmer of a chance.
http://www.aphis.usda.gov/plant_health/plant_pest_info/emerald_ash_b/downloads/multistateeab.pdf.
We just had a seminar on eab last week. It affects all fraxinus. Kills them within a year or two of infestation - entire communities of ash dead.
do not plant ash at this time. Also, treatments for eab are not affective until eab arrives in your area. Some treatments for eab can have a 'viagara' effect on other ash problems such as scale. Treatments also are likely only going to prolong the life of an ash for a few years as they become less effective on adult eab over time.
Bad news for communities with lots of ash.
Only glimmer of daylight is that some secluded populations of ash may survive as the adult borers do not fly well and are typically transported through the movement of firewood or on vehicles. EAB typically shows up in a new area in campgrounds and along transportation networks (railroads, highways). If the eab doesn't get moved into an area by either of those two means, the ash may have a glimmer of a chance.
arbor pro, who did your seminar? I am curious because much of that is opposite of what we have been hearning from the Forest Service, Michigan State and Ohio State for several years. Not doubting your relaying what you heard...but more wondering about who told it to you...
1) Of course EAB treatment is not effective until EAB arrives, because there is no EAB to be effective against. Actually, most research is showing that your best chance of saving trees is to have the treatment in place when EAB shows up.
2) As for treatments only prolonging the life because they become less effective against adults: adults are not a problem, so treatments don't need to be effective against adults. If treatments become less effective, it is because you are not killing enough larvae, and the larvae that live damage the vascular system making next year's treatment less able to translocate, meaning more larvae are left alive (and feeding) leading to more damage to the vascular system... It is impossible to say what can/will happen in the long-term because we have only known about this bug for 7 years - but there are plenty of trees that have been effectively treated and are still doing well i nheavily infested areas.
3) EAB is an excellent flier (like many Agrilus spp.). Last I heard, they flew 6 miles when forced in a lab to fly to exhaustion... Of course, that does not mean they will set course and fly 6 miles straight down the road--but it doesn't account for wind either.
HOWEVER...both sets of information agree: Bad news for communities with lots of ash, and don't plant it.
1) Of course EAB treatment is not effective until EAB arrives, because there is no EAB to be effective against. Actually, most research is showing that your best chance of saving trees is to have the treatment in place when EAB shows up.
2) As for treatments only prolonging the life because they become less effective against adults: adults are not a problem, so treatments don't need to be effective against adults. If treatments become less effective, it is because you are not killing enough larvae, and the larvae that live damage the vascular system making next year's treatment less able to translocate, meaning more larvae are left alive (and feeding) leading to more damage to the vascular system... It is impossible to say what can/will happen in the long-term because we have only known about this bug for 7 years - but there are plenty of trees that have been effectively treated and are still doing well i nheavily infested areas.
3) EAB is an excellent flier (like many Agrilus spp.). Last I heard, they flew 6 miles when forced in a lab to fly to exhaustion... Of course, that does not mean they will set course and fly 6 miles straight down the road--but it doesn't account for wind either.
HOWEVER...both sets of information agree: Bad news for communities with lots of ash, and don't plant it.
arbor pro
Addicted to ArboristSite
Dr John Ball, Forest Pest Specialist and all around tree guru from South Dakota State University along with our local extension specialist and city forester.
If I'm quoting Dr Ball wrong then, I appologize most sincerely. However, I do remember him saying that, while the EAB do fly, they do not fly well. Also, that treating EAB too soon can be detrimental to trees. He cited cases where ash trees that were treated too soon were covered with scale because the scale actually thrived off of the treatment.
Again, if I'm quoting the info I got incorrectly, I appologize; however, I do not dispute the source of the data. Dr Ball is a world-renowned tree care specialist and I liken his knowledge of trees to that of the late Alex Shigo.
I can only guess that there will continue to be discrepancies in information given regarding EAB - especially when it comes to treatment times and methods. Hopefully, folks will continue to ask questions and try to be as informed as possible so that they can represent their clients properly and ethically.
Thanks arbor pro. I have heard, and highly respect, Dr. Ball.
Just oddly/strongly conflicting info.
I'm curious what treatments caused increased scale? Imidacloprid, for example, actually controls scale...
Also regarding the flight abilities and spread of EAB - yes...the primary means of long distance spread is human-assisted movement. But that doesn't change that they do fly well. That is well documented. Here is a link from South Dakota mentioning that "The beetle can fly up to several miles to find a suitable, host but its rapid spread across Michigan and into other states has been through the movement of infested firewood and nursery stock." And the geeky research from the Forest Service. The way I explain it: I can drive 100 miles the wrong way to buy a gallon of milk, but if I need milk I'm going to pick it up on the way home. EAB can fly quite well, but it is only looking for some fresh ash and it will not fly further than it needs to.
Just oddly/strongly conflicting info.
I'm curious what treatments caused increased scale? Imidacloprid, for example, actually controls scale...
Also regarding the flight abilities and spread of EAB - yes...the primary means of long distance spread is human-assisted movement. But that doesn't change that they do fly well. That is well documented. Here is a link from South Dakota mentioning that "The beetle can fly up to several miles to find a suitable, host but its rapid spread across Michigan and into other states has been through the movement of infested firewood and nursery stock." And the geeky research from the Forest Service. The way I explain it: I can drive 100 miles the wrong way to buy a gallon of milk, but if I need milk I'm going to pick it up on the way home. EAB can fly quite well, but it is only looking for some fresh ash and it will not fly further than it needs to.
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