Category Archives: IPM

Plant and Insect Development is 2 Weeks + Ahead of Last Year!

One of the most filthiest scale insect pests known to horticulturalists, the Euonymus scale (Unaspis euonymi) is a tiny little armored scale that covets evergreen Euonymus fortunei in the garden or landscape.  Adult females have a dark cover that is wider at the posterior end, sea-shell in appearance with white margins. The smaller males have […]

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NOW IS THE TIME to Treat for Box Tree Moth Larvae in Toronto

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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.

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Box Tree Moth Larvae Are Starting to Feed in Toronto

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Those Precocious Blooms of April!

outher       Norway maple (Acer platanoides and its cultivars) are just starting to bloom in the GTA, making this one of the earliest blooms for trees since 2012! Continue reading

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April Showers and April IPM Opportunities

Unusually warm weather has hastened the flowering of many trees, shrubs and bulbs!  Although we have more seasonable daytime high’s in the forecast for the next week, night time low’s will be  above 0C in southern Ontario.  Silver maples may … Continue reading

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Crabapple Disease Management Begins Soon!

Fireblight (apple, pear, see above) and Apple Scab (apple) diseases are normally reproducing and spreading this time of year.  This week we are more concerned about Apple Scab.  The cool weather has really reduced the activity of fireblight bacteria and so the risk of fireblight is looking low again this week.    

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2021 Will Be Remembered as “The Year of the Gypsy Moth”

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Dormant Horticultural Oil App’s This Week!

Dormant oils should not be applied if the temperature is below 4C or if the temperature will approach freezing soon after application of the dormant oil spray.  The freezing temperatures can mess with the emulsion of the oil mixture and cause uneven application. Continue reading

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Questions About Pesticide Resistance?

OMAFRA Lunch and Learn Series has Answers. REPOSTED FROM: DECEMBER 18, 2020 SARAH JANDRICIC, GREENHOUSE FLORICULTURE IPM SPECIALIST, OMAFRA Pesticide resistance is something most growers have run into at some time or another. High pesticide resistance in species like western … Continue reading

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