Category Archives: Insects

Leps are languishing…. time for biocontrol

                Seeing holes in leaves on deciduous trees?  This majestic sugar maple was showing interveinal holes and closer inspection revealed fall cankerworm (Alsophila pometaria) larvae on the leaf undersides.  Larvae are pale green (although you’ll … Continue reading

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Welcome LO Nursery Scout and OMAFRA Students!

Welcome to our new 2017 LO Nursery Scout and OMAFRA Summer Student!           Melissa Huntley (left) and Andrea Badder (right) have been working diligently to scout for pests and abiotic issues in nursery crops.  The cold, … Continue reading

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Managing Spring Pests on Evergreens

Look for small, white, woolly tufts or masses on the twigs of hemlock (Tsuga canadensis) (Photos: Julie Holmes, CFIA). Right now is the BEST time to scout for Hemlock Woolly Adelgid (Adelges tsugae) because of the visibility of the egg … Continue reading

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Dormant Oil For IPM

 We’ve got milder temperatures starting today and yes, it’s still a good time to get some late dormant oil applications on in many areas of southern Ontario (Photo: overwintering nymphs of magnolia scale). As long as there is no sensitive vegetative or flower tissue emerging, you can still make dormant rate, horticultural oil applications for […]

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Its Time for Cultural Management of Fall Cankerworm

Homeowners and horticulturalists alike will remember being inundated with tiny, green loopers feeding voraciously on many of our shade trees this past spring (Acer, Betula, Celtis, Fagus, Malus, Quercus, Tilia, Ulmus).  These were the larvae or caterpillar stage of the … Continue reading

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Introduced Beech Scale Nymphs on American Beech

  Introduced Beech scale (Cryptococcus fagisugae) is easier to see this time of year on our native American beech (Fagus grandifolia).  That’s because of the white waxy coverings the females produce to protect their eggs.  Look for

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Japanese Beetle Adults Starting to Emerge

                 Japanese Beetle (Popillia japonica) adults are starting to take flight in southern Ontario!

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