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Category Archives: Diseases
Integrated Pest Management Webinars for Nursery Growers
This January, OMAFA is presenting a series of webinars focused on integrated pest management (IPM) topics for nursery growers. See below for the list of webinars and links to register through zoom. Registration is free, but you must register for … Continue reading
ARBOTECT® 20-S Fungicide label expanded via Emergency Use Registration to help manage Beech Leaf Disease on Beech Trees in Canada
By Josh Mosiondz, Minor Use Coordinator, OMAFA The Pest Management Regulatory Agency (PMRA) recently announced the approval of an Emergency Use Registration minor use label expansion registration for ARBOTECT® 20-S Fungicide for management of Beach Leaf Disease on Beech Trees … Continue reading
Beech Leaf Disease in Ontario: What is it, where is it, and what to look for
Across Ontario, reports of beech leaf disease (BLD) in the landscape have been steadily increasing and now some nurseries are also starting to see symptomatic trees. There’s a lot of unanswered questions about this new plant health issue. In the … Continue reading
Posted in Arboriculture, Diseases, Invasive Species, IPM, Nursery Production
Tagged banding on beech trees, beech leaf disease, beech mortality, beech tree health, beech tree issues, BLD, BLD ontario, Fagus, foliar nematode, L. crenatae, nursery and landscape plants, nursery crops, Nursery IPM
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Plum Pox Virus – Regulated Area Expansion in Hamilton
On Feb 24, 2025 the Canadian Food Inspection Agency (CFIA) announced the expansion of the regulated area for plum pox virus in Ontario’s Niagara/Hamilton region. This expansion follows a recent detection of the virus inside the western edge of the … Continue reading
Posted in Diseases, landscape
Tagged CFIA Plum Pox, Plum Pox Virus, PPV, PPV ontario
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Reminder: No pruning oaks from now until November
Calling anyone who deals with oak trees including nurseries, garden centers, homeowners and tree professionals! Let this be your friendly reminder: now that April is upon us, you should hold off on pruning your oaks until November to protect trees … Continue reading
Posted in Arboriculture, Diseases, Insects, IPM, landscape
Tagged CFIA, isa ontario, oak pruning, oak wilt, oak wilt ontario, quercus, regulated pest
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August 10: Pest Update
Well the summer feels like it’s flown by and somehow we are already into the second week of August. I saw that a garden center the other day had out a crop of early flowering chrysanthemums and that was quite … Continue reading
Posted in Diseases, Insects, Invasive Species, IPM, landscape, Weekly Nursery Landscape Report
Tagged August pests, BTM, Invasive species, IPM, JB, leaf spot, monitoring, overwatering, pest report, root rot, scouting in the nursery, SLF, TSSM
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NEW PEST ALERT: First Canadian Detection of Oak Wilt In Niagara
Article authored by Jenny Liu – Agroforestry, Maple, and Tree Nut Specialist, OMAFRA. FROM THE CFIA: “Oak wilt has been found in a residential area in Niagara Falls, Ontario. This is the first confirmed detection of oak wilt in Canada. To … Continue reading
Posted in Arboriculture, Diseases, Environment, Invasive Species, landscape
Tagged Invasive species, oak wilt, oak wilt canada, oak wilt niagara
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Pest Report : May Long Weekend!
Happy May long weekend to everyone! What a wonderful (and busy) time of year. This week I’ve been appreciating all the fantastic blooms in the landscape: have we ever had a bloom this long and beautiful? Not that I can … Continue reading
Posted in Diseases, Insects, IPM, Weekly Nursery Landscape Report
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Hot, Humid Days are Here
Gymnosporangium rusts, like this Cedar-Apple Rust gall, are finally sporulating! These rusts overwinter on perennial gall on the evergreen Juniperus hosts. In the spring, they are stimulated to sporulate during warm, wet periods. We’ve had the heat, but its been … Continue reading
Protect Evergreens Starting As New Growth Emerges
Monitor for needlecast and blight diseases on older foliage where new foliage is emerging on Austrian pine and Colorado spruce.
Posted in Diseases, IPM
Tagged diplodia tip blight, Jen Llewellyn, rhizosphaera on spuce
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