[HubbardBrook] EAB in HB

[Nick Rodenhouse]

I agree with Nat.  I think protecting some ash groves is a great idea.
Nick

On Sat, Jul 10, 2021 at 3:05 PM Natalie Laura Cleavitt via HubbardBrook <
hubbardbrook at lists.sr.unh.edu> wrote:

> I would like to sign up for the "protection program". That is, the orchids
> and I would like to sign up, please.  nat
>
>
> ------------------------------
> *From:* HubbardBrook <hubbardbrook-bounces at lists.sr.unh.edu> on behalf of
> Matthew P. Ayres via HubbardBrook <hubbardbrook at lists.sr.unh.edu>
> *Sent:* Saturday, July 10, 2021 1:40 PM
> *To:* hubbardbrook at lists.sr.unh.edu <hubbardbrook at lists.sr.unh.edu>
> *Subject:* [HubbardBrook] EAB in HB
>
>
> Hi Friends,
>
> It was great to see so many at the meetings this week. Thanks to the
> scores of you that contributed!
>
>
>
> I can provide some follow-up on the EAB news. Thanks to John Deitsch, on
> the bird crew, for his sharp-eyed find of an emerald ash borer in HB! Below
> is a note from Bill Davidson, Forest health Specialist, NH Division of
> Forests and Lands, that he has okayed for me to share. It includes:
>
> “I would say that this is definitely emerald ash borer. This is the
> farthest north that EAB is detected in New Hampshire …
>
> Once infested, trees in a forest will decline quickly. Given that an adult
> beetle was captured within the forest, I think it is safe to assume Hubbard
> Brook is now at the early stages of infestation. I would expect noticeable
> signs of infestation to manifest within the next 1-2 years and significant
> dieback to set-in within 3-4 years. If you are interested in protecting
> trees, you will probably want to treat them either this year or next.”
>
>
>
> Enclosed is a map from state of NH to which I have added stars for the
> point of introduction (detected in 2013) and the new detection in HB. The
> distance is about 70 km. Thus they have expanded at about 8-10 km / year.
>
>
>
> Kyle Lombard, Forest Health Program Coordinator, NH Division of Forests
> and Lands wrote:
>
> “It sounds like we should probably have a meeting between all of us and
> the Hubbard brook folks to discuss what’s about to happen to their ash
> forest.  There are some opportunities to learn from the impending loss of
> all the mature ash.  Also, the managers at Hubbard Brook might have a few
> areas they want to salvage the value or reduce standing hazard material.
> And lastly I would love to try rolling a few spots at HB into our statewide
> protection project.  The protected sites add another interesting and unique
> opportunity to study a bunch of different things. Let alone the protection
> of a mature seed source for the forest.  I’d love to meet in the field at
> the site that caught the EAB.
>
>
>
> Matt
>
>
>
> Matthew P. Ayres (h/h)
>
> Professor of Biological Sciences and co-chair of Graduate Program in
> Ecology, Evolution, Environment & Society
>
> Dartmouth College
>
> Life Sciences Center
>
> 78 College Street
>
> Hanover, NH  03755  USA
>
>
>
> 603 646-2788
>
> matthew.p.ayres at Dartmouth.Edu
>
> http://www.dartmouth.edu/~mpayres/
>
> http://sites.dartmouth.edu/EEES/
>
>
>
> *From:* Davidson, William <William.Davidson at dncr.nh.gov>
> *Sent:* Thursday, July 1, 2021 16:28
> *To:* Matthew P. Ayres <Matthew.P.Ayres at dartmouth.edu>; Lombard, Kyle <
> Kyle.D.Lombard at dncr.nh.gov>
> *Cc:* John Deitsch <jfd77 at cornell.edu>; Jeff.Garnas at unh.edu; Elizabeth A.
> Studer <Elizabeth.A.Studer.GR at dartmouth.edu>
> *Subject:* RE: Emerald Ash Borers at HB?
>
>
>
> Hi Matt,
>
>
>
> Thank you for sending this along, I would say that this is definitely
> emerald ash borer. This is the farthest north that EAB is detected in New
> Hampshire, with the next closest detections to date being about 7 miles
> away along E Rumney Road in Rumney and along Rt. 3 in Campton near the
> Plymouth line. These detections were made via visual survey during the past
> winter and it is possible that there are symptomatic trees in Thornton at
> this time that were either missed when I did my winter survey or were not
> symptomatic at the time. The natural dispersal range of EAB is estimated at
> about 2-4 miles per year, so it seems likely that the source of the beetle
> could be in Thornton. It’s also possible that there are infested trees at
> Hubbard Brook that haven’t reached the threshold of being symptomatic which
> served as the host. You could fell and debark trees adjacent to the trap to
> look for signs of infestation.
>
>
>
> Once infested, trees in a forest will decline quickly. Given that an adult
> beetle was captured within the forest, I think it is safe to assume Hubbard
> Brook is now at the early stages of infestation. I would expect noticeable
> signs of infestation to manifest within the next 1-2 years and significant
> dieback to set-in within 3-4 years. If you are interested in protecting
> trees, you will probably want to treat them either this year or next. Kyle
> and I are both licensed pesticide applicators and would be happy to help,
> although we may need approval from the Forest Service to do any work within
> the WMNF. For protecting ash from EAB, products containing emamectin
> benzoate as the active ingredient are most effective and the only thing we
> recommend. This is can be applied as a trunk injection any time during the
> summer and is effective for 2-3  years per treatment.
>
>
>
> Sincerely,
>
> Bill Davidson
>
> Forest health Specialist
>
> NH Division of Forests and Lands
>
> 603-892-5156
>
>
>
>
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-- 
Nicholas L. Rodenhouse
Professor Emeritus of Biological Sciences, Wellesley College
16 Morse Road
Sherborn, MA
Phone 508-651-2557
email: nrodenho at wellesley.edu
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