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

Dead Gypsy moth Larva hanging from leaf mid vein, killed by virus

Is this a Gypsy moth larva doing yoga? NO! Its the symptoms of infection by a naturally occuring Nucelar Polyhedrosis Virus (NPV). We are starting to see larvae succumbing to NPV in infested forested areas, likely due to understory canopy buffering against wind and rain dispersal of NPV particles. They say one infected larva can be a source of as many as 1 Million virus particles! Thanksfully, NPV is specific to Gypsy moth.

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Gypsy Moth- Time to Switch Up Management Practices

Many Gypsy moth larvae have reached the stage where they are 2.5 cm long with a yellow head capsule. This is the point of greatly reduced efficacy of B.t.K. It also marks the beginning of their heaviest feeding period . (Photo: Lexi Cupoli, LO Nursery Scout) hav
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Boxwood Leafminer Adults Are Flying Where Black Locusts are in Flower Bud!

BoxLeafMinerDamageApril

Boxwoods in the landscape not looking so good?  Are you seeing a lot of yellow-brown spots on leaves? Continue reading

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Hot, Humid Days are Here

Cedar-Apple Rust (Gymnosporangium juniperi-virginianae) on Eastern red cedar (Juniperus virginiana) is FINALLY sporulating after the rains we just had!

Gymnosporangium rusts, like this Cedar-Apple Rust gall, are finally sporulating! These rusts overwinter on perennial gall on the evergreen Juniperus hosts. In the spring, they are stimulated to sporulate during warm, wet periods. We’ve had the heat, but its been so dry….these galls have been sitting dormant. Until this week. Good news: the alternate Rosaceous hosts (Malus, Crataegus, Amelanchier etc.) have leafed out and those leaves have hardened off, making them very tolerant of rust infections this late in the spring. Soooo, the poor Gymnosporangium rust spores will have a difficult time infecting the Rosaceous hosts, meaning we can expect much LESS rust diseases on our apples, crabapples, serviceberry and hawthorns.

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

Box tree moth larva
Mid Instar Larva of Box Tree Moth (Cydalima perspectalis) can be found actively feeding on boxwood in some residential gardens. This is the perfect time to spray biological insecticides like Dipel, Xentari. (photo: J. Llewellyn).
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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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An Ill Wind That Blows No Good….#GypsyMoth 2021

The warmer weather has supported the continued hatch and excitement for first instar Gypsy moth (Lymantria dispar) larvae this week!  The cool temperatures of last week had larvae huddled up in wait.  But the sudden heat and warm breezes have convinced 1st instar larvae to climb up to the top of their egg mass hosts, cast out a tiny thread and balloon out in the air in hopes of landing on a desirable plant host.  But there are so many larvae in some areas….they are also landing on you and me.  

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Agri-Tech Innovation Program – Early Adopters Stream is OPEN

Field Production of Deciduous Trees at Winkelmolen Nursery, Ontario

Calling all Nursery Growers!

The Agri-Tech Innovation Program -Early Adopters Stream- is LIVE!

Funding for Advanced Technologies to Mitigate COVID-19 Transmission Risk in the Agri-Food Sector

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Box Tree Moth Larvae Are Starting to Feed in Toronto

LOOK FOR these EARLY SIGNS: Overwintered BOX TREE MOTH LARVAE are waking up and starting to feed on leaves in Toronto. These young larvae chew one side of the leaf and leave behind webbing and frass. (photo: J. Llewellyn).
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They’re BACK! Gypsy moth are hatching!

Gypsy moth larvae are starting to hatch in Southern Ontario! (Photo: Meadowood Tree Service)

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