These Cloudy, Hazy, Humid Days are Numbered

U.S. forest fires make the Big Smoke even smokier, but there's no risk to  human health, expert says | CBC News
Photo credit: cbc.ca

Looking up at the sky today, it was so hazy you couldn’t see much but a fuzzy-looking grey. This is a different kind of overcast than what we normally get to experience. Hundreds of wildfires are burning in the west and prevailing winds are carrying the smoke eastward to Ontario and beyond. “The layer of smoke is in the upper atmosphere and it is not affecting air quality”, Peter Kimbell, a warning preparedness meteorologist for Environment Canada based in Ottawa, told CBC Toronto. Get ready for some cooler weather on its way for Wednesday ūüôā

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Start Treating for the 2nd Generation of BTM Larvae in Toronto

Feeding damage and one larva of box tree moth
Early-Mid Instar Larva of Box Tree Moth (Cydalima perspectalis) can be found actively feeding on boxwood in some residential gardens. This is the second generation of larvae for the 2021 season and they can be found feeding for the next 3-4 weeks. Inspect all twigs and foliage carefully, pull branches apart to find well-camouflaged green larvae with black heads hiding on inside foliage. This is the perfect time to spray biological insecticides like Dipel, Xentari, Bioprotec. There is also an emergency use registration for Deltagard SC for agriculture. (photo: J. Llewellyn).

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The Friyay Report – July 8th, 2021

Flightless, adult female Gypsy moths are crawling up trunks and laying their eggs in bark crevices. Ontario is seeing moderate-severe infestation levels of Gypsy moth (Lymantria dispar) across southern Ontario again this year. But we have some good news to report!
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You Are Ontario’s Early Warning System: Spotted Lanternfly NYMPHS!

spotted-lanternfly-nymphs-adults
info.nc.agr.com

Here’s a pest you have been hearing about more and more, the Spotted Lanternfly (Lycorma delicatula).¬†¬†It is not a fly, but a planthopper. In the Order Hemiptera, Family Fulgoridae.¬† It is actually a much stronger hopper than it is a flyer.¬† They may remind you of frogs they way they sit and hop around. Found recently in the US and now spreading rapidly across several states,¬† Spotted Lanternfly is a pest we are actively looking for in Ontario. IF YOU THINK YOU HAVE FOUND THIS PEST, PLEASE REPORT IT TO CFIA BY CLICKING HERE. OR Call: 1-800-442-2342

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Japanese Beetles Have Started To Emerge

<a href="/clm/species/popillia_japonica"><em>Popillia japonica</em></a> (Japanese Beetle) adult on cedar.       Japanese Beetle (Popillia japonica) adults are starting to take flight in southern Ontario!  They have been spotted in Hamilton and Toronto this week. Continue reading

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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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