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Tag Archives: elm zigzag sawfly
Nursery IPM Update: June 3, 2025
Due to cooler temperatures last week, most regions of Southern Ontario are still between the 100-150 GDD (base 10°C) range with full bloom of Aesculus hippocastanum and spireae x vanhouttei. In more southern regions such as Harrow, GDD is closer … Continue reading
Posted in Insects, IPM, Weekly Nursery Landscape Report
Tagged box tree moth IPM, box tree moth spring, elm zigzag sawfly, honeylocust plant bug, hydrangea bacterial leaf spot, hydrangea disease, landscape plant IPM, landscape plant pests, nursery crops, Nursery IPM, nursery IPM report, Ontario nursery IPM, Ontario pests, Ornamental IPM, PLH, potato leaf hopper, strawberry root weevil
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Elm Zigzag Sawfly: a new(ish) pest for Southern Ontario
Elm zigzag sawfly (Aproceros leucopoda) is an invasive forestry pest from Asia that can cause defoliation of elm trees (Ulmus spp). The first report of Elm zigzag sawfly (EZS) in North America was in July of 2020, by an iNaturalist … Continue reading
Posted in Insects, Invasive Species, IPM
Tagged elm zigzag sawfly, EZS, Invasive species, ipm in the nursery, ontario invasive species, pests of elm, sawflies
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