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Category Archives: Diseases
Managing a Few Diseases on Ornamentals
Remember all that Fireblight (1st photo) and Apple scab (2nd photo) we had the last couple of years on apple, crabapple and pear? Now is the time to start fighting back.
Posted in Diseases, IPM, Nursery Production
Tagged apple scab, filbert blight, fireblight, Jen Llewellyn, mike celetti, omafra
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Mid-Fall is a great time for IPM in the Landscape
The rainy, cool conditions that characterized the 2014 growing season have left their mark on several trees and shrubs. There is an unprecedented amount of foliar diseases in the landscape, some of which we don’t commonly see from year to … Continue reading
Posted in Arboriculture, Diseases, IPM, landscape, Mites
Tagged ipm nursery, Jen Llewellyn
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Yellow, distorted and disappearing leaves?
Gypsy moth larvae are finally finishing up their foliar munching and are pupating across Southern Ontario. Female larvae can measure up to 3 inches long, they need to be bigger than males since it takes so much energy to produce … Continue reading
Posted in Diseases, Insects, IPM
Tagged crabapples tolerant to apple scab, Jen Llewellyn
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Avoid Extensive Pruning of Apple and Pear
With the warm, wet conditions we’ve had in southern Ontario so far this spring, Fireblight has been running rampant on apple and pear. Symptoms appear as branch tip wilting, stems crooking, leaves turning dark brown and persisting on the tree….
June 7, 2014 IPM in the Nursery & Landscape
Environment Canada is calling for a gorgeous weekend, right through until early next week!!! Do you have a Harlequin Norway maple (Acer platanoides ‘Drummondii’ )? Did you notice how sometimes the twigs will revert back to solid green? Keep … Continue reading
Lot’s and lot’s of spots (May 30/14)
Until recently, we’ve been experiencing a fairly cool, wet spring with some pretty significant temperature shifts over a short period of time. The differences in day and night temperatures can be very damaging to plant tissue and we have seen … Continue reading
Posted in Diseases, Nursery Production, Weather
Tagged Jen Llewellyn, low temperature injury, Pseudomonas syringae
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A rainy, warm week ahead
Environment Canada is forecasting a 40-60% chance of precipitation for much of this week, its raining in the southwest this morning. There are several diseases that will be active this week on Rosaceous plants such as apple, pear and serviceberry…..
Fire Blight Prediction for May 27 – June 2, 2013
The recent rain and current hot, humid conditions are PERFECT for the development of fire blight (bacteria, Erwinia amylovora) on Rosaceous trees such as apple, pear and mountain ash. The bacteria enters through stomates or mild wound sites and can … Continue reading
Welcome to ONnurserycrops Blog!
Welcome to ONNurseryCrops
