Japanese Beetle (Popillia japonica) adults are starting to take flight in southern Ontario! They have been spotted in Niagara this week. Continue reading
Gypsy moth larvae have donned their yellow heads and are much longer than 2.5 cm…..which means they are no longer susceptible to the biocontrol Bacillus thuringiensis (B.t./Dipel/Foray). Continue reading
Maple anthracnose, caused by several different fungi, are quite common this year due to cooler temps and frequent rains.
Foliar diseases such as Anthracnose can be seen on deciduous trees in the landscape, especially on maple, ash and oak. The fungus infects leaf tissue as it is emerging, especially during cool, wet springs. Fungal infection causes some distortion and necrosis. Infected leaves usually remain functional. Fear not, symptoms will soon be masked by the emergence of the second flush of leaves. Continue reading
Boxwoods in the landscape not looking so good? Are you seeing a lot of yellow-brown spots on leaves? Continue reading
First instar Gypsy moth (Lymantria dispar) larvae have hatched and are dispersing!
Larvae produce silken threads and take a ride in the wind in hopes of landing on other delicious botanical hosts.
We can still see the remains of low temperature injury from a couple of weeks ago. Not to worry, the next set of leaves will cover up the desiccated leaves and stems.
Posted in Arboriculture, Christmas Trees, Diseases, Environment, Insects, IPM, landscape, Nursery Production, Plant Nutrition, Weather, Weekly Nursery Landscape Report
Tagged @onnurserycrops, bugfinder, dave cheung, onnurserycrops
Monitor for needlecast and blight diseases on older foliage where new foliage is emerging on PINE and SPRUCE.
Environment Canada is calling for sunshine and highs in the mid-20’s C by next weekend. Get our your sunblock Ontario, this is happening!
Posted in Arboriculture, Borers in Landscape Trees, Christmas Trees, Diseases, IPM, landscape, Nursery Production, Weather, Weekly Nursery Landscape Report
Tagged bugfinder, ipm in the landscape, ipm in the nursery, Jen Llewellyn, onnurserycrops, pest management, plant health, plant phenology, treehealth
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 covering on the egg masses. Continue reading