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Tag Archives: Jen Llewellyn
The Tuesday Report – July 24, 2018
Are you seeing black marginal necrosis on the newest growth of Pear (Pyrus) trees? We saw the same phenomenon back in 2016 and after several attempts at culturing pathogens failed, … Continue reading
Posted in Weekly Nursery Landscape Report
Tagged arboriculture, fall webworm, IPM, Jen Llewellyn, landscape plants, nursery crops
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Are You Seeing Nutritional Deficiency Symptoms on Woody Plants?
Do you ever see chlorotic or stunted leaves and wonder if it could be a particular nutrient deficiency? Soil nutrient testing can be a good tool to assess levels of … Continue reading
Time To Prune Boxwood and Eastern White Cedar
Remember all those yellow spots on boxwood leaves we had this spring? These were the feeding sites of the overwintering larvae of boxwood leafminer (Monarthropalpus buxi, M. flavus).
IPM This Week – July 9, 2018
Fall webworm (Hyphantria cunea) are laying their eggs on foliage (Juglans, Prunus, Betula, Fraxinus) at this time (Photo: Charlotte Thomson, LO Nursery Scout). They have multiple generations per year and most people … Continue reading
The Beetles Are Back Again
Japanese Beetle (Popillia japonica) adults are starting to take flight in southern Ontario!
Posted in Insects, IPM
Tagged european chafer, japanese beetle, Jen Llewellyn, onnurserycrops
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Happy Summer Solstice (Yesterday) Eh?
One of the most filthiest scale insect pests known to horticulturalists, the Euonymus scale (Unaspis euonymi) is a tiny little armored scale that covets evergreen Euonymus fortunei in the garden or landscape. Adult females have a dark cover that is wider at the posterior end, sea-shell in appearance with white margins. The smaller males have […]
Posted in Insects, IPM, landscape, Nursery Production
Tagged bugfinder, dave cheung, Jen Llewellyn, onnurserycrops
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Injectable Solutions for Landscape Trees
Emerald ash borer adults are laying eggs. Injectable insecticides are available to help keep trees healthy.
Boxwood Leafminer Adults Starting to Fly
Boxwoods in the landscape not looking so good coming out of the winter? Are you seeing a lot of yellow leaves? Can you see any yellow-green-brown spots?
It’s June 1st Already!
We’ve just entered one of the busiest times of year for IPM managers of outdoor ornamentals. Plants are lush and pests and diseases are hungry. Are you seeing discoloured, pimple-like spots on the foliage of pear trees?
Leps are languishing…. time for biocontrol
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
