[CANUFNET] [External email] Question to mailing list members

SOS Trees Coalition trees at sostrees.ca
Fri Mar 5 19:30:31 EST 2021


Yes I had the same thought about removal of that growth.  That would be
more of an entry point than if it were left alone.
We have always had a number of American elms with epicormic growth here in
Saskatoon and they don't necessarily look unhealthy or stressed.
I am not sure why this researcher seems to think it is a problem.  We will
look into it a little more.
So far we have only had 2 cases of DED here.  We are crossing our fingers
that it can be detected early  if we get another. Both trees in different
areas of the city were removed promptly with no more cases so far.

Linda Moskalyk
SOS Trees Coalition
https://www.sostrees.ca/index.html

On Fri, Mar 5, 2021 at 4:22 PM Mike Jenkins via CANUFNET <
canufnet at list.web.net> wrote:

> In general, I would think that the wound generated by removing the
> epicormic growth would be a greater attractant and a greater risk of entry
> for the beetles than leaving the growth in place.
>
> The epicormic growth itself could be an indicator of where vascular
> blockage is occurring - potentially due to gallery formation or
> fungal growth.  The growth then would be a response to an infestation or
> injury that already occurred, and not the causative agent of the gallery or
> fungus.  The weaker connections of epicormic growth would also be more
> vulnerable to being removed accidentally by wind or other factors, again
> potentially creating an entry point for the beetles.  For these reasons a
> tree with epicormic growth should be a target of increased monitoring and
> surveillance.
>
> On Fri, 5 Mar 2021 at 13:14, Russell Eirich via CANUFNET <
> canufnet at list.web.net> wrote:
>
>> Epicormic growth probably means there is some factor causing decline in
>> the overall tree health.  This would then correspond to a possible
>> increased beetle predation with vector transmission of DED.
>>
>>
>>
>> Just a thought - But I don’t have documented proof either.
>>
>>
>>
>> Regards
>>
>> Russell
>>
>>
>>
>> *From:* CANUFNET <canufnet-bounces at list.web.net> *On Behalf Of *SOS
>> Trees Coalition via CANUFNET
>> *Sent:* Friday, March 5, 2021 1:31 PM
>> *To:* canufnet at list.web.net
>> *Cc:* SOS Trees Coalition <trees at sostrees.ca>
>> *Subject:* [External email] [CANUFNET] Question to mailing list members
>>
>>
>>
>> Here is a question that I would like to have posted to the subscribers:
>>
>>
>>
>> Has anyone heard of the need to remove watersprouts from American Elm
>> trunks because they could be a source of entry for the elm bark beetle?  We
>> have been alerted to this by a university researcher who claims that
>> leaving this growth on elms can leave them vulnerable to Dutch Elm disease.
>> I have never heard of this and want to know if anyone has information to
>> support it.
>>
>>
>>
>>
>>
>> Linda Moskalyk
>>
>> President
>>
>> SOS Trees Coalition
>>
>> Saskatoon
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> .
>>
>>
>>
>>
>>
>> *CAUTION: This email originated from outside the organization. Do not
>> open links or attachments you were not expecting, even from known senders.
>> Contact the TDI ServiceDesk at 306-777-7980 if the email is suspicious. *
>> DISCLAIMER: The information transmitted is intended only for the
>> addressee and may contain confidential, proprietary and/or privileged
>> material. Any unauthorized review, distribution or other use of or the
>> taking of any action in reliance upon this information is prohibited. If
>> you received this in error, please contact the sender and delete or destroy
>> this message and any copies.
>>
>
>
> --
>
> [image: Edmonton_sig_RGB_S.jpg]
>
> Mike Jenkins
>
> PEST COORDINATOR
> ANIMAL CARE & PEST MANAGEMENT
>
> CITIZEN SERVICES  |  COMMUNITY STANDARDS & NEIGHBOURHOODS
>
> 780-496-6395  OFFICE
>
> 780-918-7731  MOBILE
>
>
> CITY OF EDMONTON
>
> PEST MANAGEMENT
>
> 12312 - 107 ST
>
> Edmonton AB T5G 2S7
>
> Pronouns (He/Him)
>
> All information contained in this email post is proprietary to the City of
> Edmonton, confidential and intended only for the addressed recipient. If
> you have received this post in error, please disregard the contents, inform
> the sender of the misdirection, and remove it from your system. The
> copying, dissemination or distribution of this email, if misdirected, is
> strictly prohibited.
>
>
> *The contents of this message and any attachment(s) are confidential,
> proprietary to the City of Edmonton, and are intended only for the
> addressed recipient. If you have received this in error, please disregard
> the contents, inform the sender of the misdirection, and remove it from
> your system. The copying, dissemination, or distribution of this message,
> if misdirected, is strictly prohibited.*
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://list.web.net/pipermail/canufnet/attachments/20210305/7f3f7678/attachment.htm>


More information about the CANUFNET mailing list