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Category Archives: Insects
Early Spruce Sawfly Damage Can Look Like Needle Burn
Take a quick scan of the new growth on spruce, especially Colorado spruce (Picea pungens). Look for straw-like needles that are withering….and the disappearance of needles all together. This is very typical damage of Yellow Headed Spruce Sawfly (Pikonema alaskensis).
Posted in Arboriculture, Insects, IPM
Tagged gypsy moth, Jen Llewellyn, spruce sawfly, yellow headed spruce sawfly
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Jumping for Joy in the Foliage (June 8)
What a spring for cankerworms! A few species of cankerworms (Geometrids) can be found feeding on trees and shrubs in the landscape and nursery. The greater Hamilton area is seeing significant populations of Fall Cankerworm, pale-green larvae that move like … Continue reading
Posted in Christmas Trees, Insects, IPM, Nursery Production
Tagged ipm nursery, Jen Llewellyn
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Dormant Oil, Still A Great IPM Tool
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 … Continue reading
A Few Early Season Pests
Now is a great time to scout for overwintering pests in the landscape and nursery. There is still an opportunity to apply cultural management methods to reduce pest incidence on woody plants. For those of you in areas where bagworm … Continue reading
Posted in Insects, IPM
Tagged bagworm, eastern tent caterpillar, gypsy moth, Jen Llewellyn, viburnum leaf beetle
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Silver maples are starting to Bloom
It’s been a mild winter and we have already started racking up some Growing Degree Days in Southern Ontario. The silver maples (Acer saccharinum) are blooming down in Essex county and the flowers are starting to open in the GTA. … Continue reading
Posted in Arboriculture, Insects, IPM, Nursery Production
Tagged dormant oil, Jen Llewellyn
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Don’t Kiss Your Ash Goodbye Just Yet….
New research conducted by Michigan State University has confirmed what some previous studies were finding – that some of our common ash species may actually be showing tolerance to Emerald Ash Borer (Agrilus planipennis, EAB).
Get Ready for Fall Scale Management
Many horticultural professionals are ramping up for fall applications of horticultural oil. The full rate of horticultural oil is excellent for smothering juvenile stages of insects this time of year.
Posted in Arboriculture, Insects, Weekly Nursery Landscape Report
Tagged beech scale, Jen Llewellyn, magnolia scale
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June 8 – Do You Know Where Your Bugs Are?
It’s official, climatologists are calling for a cooler summer with above average precipitation for the Great Lakes Region, that means us. Weather phenomena are conspiring to make this a wetter and potentially cooler season for us. This means exceptional transplant … Continue reading
Posted in Diseases, Insects, IPM, Nursery Production, Weekly Nursery Landscape Report
Tagged bagworm, Jen Llewellyn, peachtree borer
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Potato Leafhoppers are Feeding on Shade Trees
ADULT Potato leafhoppers are feeding on deciduous shade trees in the nursery. Young nursery stock is more susceptible to injury and damaged trees can be more at risk of winter dieback. ADULT potato leafhoppers overwinter in the southern states, gradually migrate … Continue reading
Posted in Insects, IPM, Nursery Production
Tagged Jen Llewellyn, pests of shade trees in the nursery, potato leafhopper
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Spruce Sawfly is Doing It’s Thing
Take a quick scan of the new growth on spruce, especially Colorado spruce (Picea pungens). Look for straw-like needles that are withering….and the disappearance of needles all together. This is very typical damage of Yellow Headed Spruce Sawfly (Pikonema alaskensis).
Posted in Arboriculture, Insects, IPM
Tagged gypsy moth, Jen Llewellyn, spruce sawfly, yellow headed spruce sawfly
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