Category Archives: IPM

Yellow Headed Spruce Sawfly and Gypsy Moth Hiding & Feasting

In the north Toronto area, there is quite a problem with yellow headed spruce sawfly.  I blogged about their hatch last week and already they have grown to 10-15 mm long! Take a quick scan of the new growth on … Continue reading →

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June 13: OMAF Nursery & Landscape Report

Environment Canada is calling for much cooler, sunny weekend with  temperatures ranging from 19-21oC in many areas.  What perfect weather for weeding and rehabilitating old garden beds and planting more trees, shrubs and perennials! The cool, weather we experienced this … Continue reading →

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IPM for Trees Workshop July 15 @ Guelph Arboretum

The 2nd Annual Hands-On Integrated Pest Management (IPM) Workshop is coming up at: THE UNIVERSITY OF GUELPH ARBORETUM GUELPH, ONTARIO Tuesday July 15, 2014 9:00 a.m. to 3:30 p.m. This returning ISA Ontario Chapter “IPM FOR WOODY PLANTS” field course is…

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June 12/14: Yellow headed spruce sawfly is OUT

Look for tiny larvae of  Yellow-headed spruce sawfly feeding on tender new needles of spruce (e.g. Colorado spruce) in the landscape.  Plant phenology indicator:  Robinia pseudoacacia (black locust) in full bloom.  Larvae are green with lighter longitudinal stripes, yellow-brown heads.  … Continue reading →

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June 7, 2014 IPM in the Nursery & Landscape

Environment Canada is calling for a gorgeous weekend, right through until early next week!!!   Do you have a Harlequin Norway maple (Acer platanoides ‘Drummondii’ )?  Did you notice how sometimes the twigs will revert back to solid green?  Keep … Continue reading →

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Potato Leafhoppers are BACK!

ADULT Potato leafhoppers have arrived in southern Ontario! ADULT potato leafhoppers overwinter in the southern states, gradually migrate up from the south each spring and will feed and lay their eggs on newly expanding leaf tissue as they go. The … Continue reading →

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Get OUT! Honeylocust Plant Bugs Are

  Honeylocust Plant Bug nymphs were found feeding on emerging foliage of Gleditsia tricanthos (honeylocust) in the Greater Toronto area this week.  Plant bugs are tiny, yellow-green insects that feed with piercing-sucking mouthparts on emerging foliage.  They have a toxic … Continue reading →

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Lots going on in IPM this week May 30/14

Environment Canada is forecasting a lovely, warm weekend.  Rain may return on Monday so keep that in mind if you are still managing diseases during leaf emergence. What a beautiful weekend for digging up dandelions and re-seeding the lawn and … Continue reading →

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May 26/14: Is that one dead too?

  PLANT PHENOLOGY indicators this week, A) north of 401, include: Cercis canadensis (redbud, full bloom); Amelanchier laevis (serviceberry, late bloom); Syringa vulgaris (common lilac, early bloom) (150-200 GDD base 10oC)B) Niagara: Aesculus hippocastanum (horsechestnut, full bloom); Prunus serotina (black … Continue reading →

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It’s raining again (May 20, 2014)

Rain is in the forecast for much of southern Ontario for the next 24 hours.   There is a chance of thunderstorms in some areas.  This is FANTASTIC weather for shopping at the local garden centre and watering in newly planted … Continue reading →

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