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Tag Archives: Jen Llewellyn
Upcoming IPM Workshops for Landscape, Arboriculture and Garden Centre Professionals!
Looking for a fun, educational workshop to brush up on your plant health knowledge and skills? Looking to network with other professionals? Have I got the workshop for you! OMAFRA-ISA Course: “IPM for Woody Plants” Click below for registration page:
Protect Evergreens Now, New Growth is Starting To Emerge!
Monitor for needlecast and blight diseases on older foliage where new foliage is emerging on PINE and SPRUCE.
Posted in Diseases, IPM
Tagged diplodia tip blight, Jen Llewellyn, rhizosphaera on spuce
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Fall Cankerworm & Gypsy Moth Populations Looking Moderate-High in Some Areas
Seeing holes in leaves on deciduous trees? This 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 often … Continue reading
Welcoming The Victoria Day Long Weekend!
What a treat! Several of our sugar maples are blooming this year all over southern Ontario, from Barrie to Niagara, these native beauties are gracing our landscapes with blooms. Its been 5 years since sugar maples were blooming like this. The cooler weather continues! Climatologists are predicting that our daytime temperatures will stay moderate until about the […]
Keep Protecting Susceptible Malus, Pyrus etc.
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.
Posted in Diseases, IPM, landscape, Nursery Production
Tagged apple scab, fireblight, Jen Llewellyn, mike celetti
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Insect Pests on Evergreens Right Now
Look for small, white, woolly tufts or masses on the twigs of hemlock (Tsuga canadensis) (Photos: Julie Holmes, CFIA). It is still a good time to scout for Hemlock Woolly Adelgid (Adelges tsugae) because of the visibility of the white … Continue reading
Posted in Insects, landscape, Nursery Production
Tagged evergreen ipm, Jen Llewellyn, onnurserycrops
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Protect Crabapple, Serviceberry, Pears Now From Juniper Rusts
Gymnosporangium rusts are sporulating now on Juniperus hosts. Look for orange, gelatinous structures on foliage and stems of various Juniperus spp. They are sporulating both in container production and in the field. They can be found sporulating when the Cercis … Continue reading
Posted in Diseases, landscape, Nursery Production
Tagged cedar apple rust, gymnosporangium rust, Jen Llewellyn, onnurserycrops
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Those Darling Buds of May- 2018
Lots of early Plant Phenology indicators are blooming this week! That puts us somewhere around 15-25 GDD’s Base 10C in the GTA. A little more in the southwest (London and west). Plant Phenology indicators this week … Continue reading Continue reading
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 […]
Posted in Insects, IPM, landscape
Tagged dormant oil, horticultural oil, Jen Llewellyn
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April Snowstorms Bring May Flowers
There may still be snow in the bush but at long last, its been warm enough to support bloom on several early flowering plants. It looks like the warming trend will continue, according to the 7 day weather forecasts. After … Continue reading
Posted in Arboriculture, IPM, landscape
Tagged bagworm, bugfinder, city of toronto, eastern tent caterpillar, fall cankerworm, gypsy moth, Jen Llewellyn
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