[CANUFNET] Sugar Maple Decline Bancroft Ontario near Algonquin park

Wed Jul 8 10:11:10 EDT 2020

Astrid,

Thank you so much for your assistance.

With regard to Gypsy moths, we are receiving reports of heavy infestations
across a wide area of the province. It is one of the most common questions
being currently addressed by MGOI. This invasive species is unquestionably
part of the issue as may be disease pressures. Field assessment is vital,
so I am grateful for the references.

Best Regards,
Catherine Kavassalis
MGOI.ca

On Wed, Jul 8, 2020 at 10:00 AM Astrid Nielsen <
astrid.nielsen at dendronforestry.ca> wrote:

> Hi Catherine,
>
> Ditto to the other replies regarding a field assessment - that would be a
> requirement. The OPFA has a consultants list that may have someone in the
> area: https://opfa.ca/contact-us/consultants-list/#!directory/map or ISA:
> https://www.treesaregood.org/findanarborist/findanarborist. There are
> also MFTIP plan approvers: https://www.sps.mnr.gov.on.ca/MFPAListing/
>
> Note that there has been a significant gypsy moth outbreak in the vicinity
> this year. Through field observations, I have heard that the centres of
> infestation are southeast of Bancroft around Plevna and Ompah, but it is
> appearing throughout the area. Again, this would have to be confirmed in
> the field, and an IPM solution would have to be developed based on severity
> of the outbreak, management objectives, etc.
>
> Hope this helps...good luck.
>
> Astrid
> __________________________________________
> *Astrid Nielsen, *MFC
> Ontario Registered Professional Forester
> ISA Certified Arborist®
> ISA Tree Risk Assessment Qualified
>
> astrid.nielsen at dendronforestry.ca
> +1.613.805.WOOD (9663)
>
> www.dendronforestry <http://www.dendronforestry.ca>
>
>
> On Mon, Jul 6, 2020 at 9:01 AM C. Kavassalis via CANUFNET <
> canufnet at list.web.net> wrote:
>
>> I am a volunteer with  the Master Gardeners of Ontario and field
>> questions from across Ontario. I received a desperate request from an
>> individual in the Bancroft area regarding managed maple forest in
>> decline. Canopy dieback, heavy insect damage including caterpillars,
>> weevils, and aphids, along with mites and disease pressures seem to be
>> occurring.
>>
>> In the one photo provided, I can observe two species of weevils (one
>> appears to be Phyllobius oblongus - European Snout Beetle), a green
>> aphid issue (with associated honeydew), some minor leaf miner
>> activity, eriophyid mites with what may be erineum galls, minor leaf
>> spots, a leaf roller, and webbing from unknown source (possibly mite).
>> He reports additional caterpillar activity, which I presume are gypsy
>> moths as they are widely reported in the region this year.
>>
>> He is unable to find anyone in the area to provide him support and advice.
>>
>> Based on my reading, I have advised soil testing with particular
>> attention given to phosphorus levels and potential  imbalances in Ca,
>> Al, Mg and Mn. If consistent with soil tests, I have recommended
>> liming based on recent article by Moore (2020).
>>
>> If open land is adjacent to the maple stand, I have also recommended
>> creating a meadow buffer to support natural predators like lacewings
>> and parasitic wasps to help control the aphids and insect pest
>> populations.
>>
>> Please let me know if this advice is sound and what other measures
>> this individual might take. Could you recommend advisors or
>> consultants in the Bancroft area that might assist this landowner?
>>
>> Thank you for your attention to this inquiry.
>>
>> Best Regards,
>> Catherine Kavassalis
>> Master Gardeners of Ontario
>> MGOI.ca
>> Admin. https://www.facebook.com/groups/MasterGardenersofOntario/
>>
>>
>>
>> A few of the articles I have reviewed:
>>
>> Bal, T. L., Storer, A.J., Jurgensen, M.F. et al. (2015). Nutrient
>> stress predisoses and contributes to sugar maple dieback across its
>> northern range: a review. Forestry 88: 64-83
>>
>> McLaughlin D.L., Linzon S.N., Dimma D.E., McIlveen W.D. (1987) Sugar
>> Maple Decline in Ontario. In: Hutchinson T.C., Meema K.M. (eds)
>> Effects of Atmospheric Pollutants on Forests, Wetlands and
>> Agricultural Ecosystems. NATO ASI Series (Series G: Ecological
>> Sciences), vol 16. Springer, Berlin, Heidelberg
>> https://link.springer.com/cha.../10.1007/978-3-642-70874-9_7
>>
>> Moore, Jean-David & Duchesne, Louis & Ouimet, Rock & Deschênes,
>> Marie-Lou. (2020). Liming improves sap characteristics of sugar maple
>> over the long term. Forest Ecology and Management. 464. 118044.
>> 10.1016/j.foreco.2020.118044.
>>
>> McKenney, Daniel & PEDLAR, JOHN & LAWRENCE, KEVIN & CAMPBELL, KATHY &
>> Hutchinson, M.F.. (2007). Potential Impacts of Climate Change on the
>> Distribution of North American Trees. BioScience. 57. 939-948.
>> 10.1641/B571106.
>>
>> OMAFRA. Beneficial Insects in Tree Fruit Orchards in Southern Ontario
>> www.omafra.gov.on.ca/english/crops/facts/96-029.htm
>>
>> Tara L. Bal, Andrew J. Storer, Martin F. Jurgensen. Evidence of damage
>> from exotic invasive earthworm activity was highly correlated to sugar
>> maple dieback in the Upper Great Lakes region. Biological Invasions,
>> 2017; DOI: 10.1007/s10530-017-1523-0
>>
>>
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