Tag Archives: pest control

Are Garden Fleahoppers a Problem on Lavender?

Posted on August 25, 2021 by Sean Westerveld

By Estella Crosby, Summer Research Assistant, OMAFRA Garden fleahopper (Microtechnites bractatus) is an occasionally severe pest of lavender and potentially other perennial members of the mint family, especially when grown over black plastic mulch where warmer temperatures promote faster development … Continue reading →

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Ginseng Crop Update – June 17, 2021

Posted on June 17, 2021 by Sean Westerveld

Leafrollers and Leaf Folders This appears to be a bad year for leafrollers/leaf folders in ginseng. Based on previous research we conducted to identify the species, the primary insect growers are dealing with now are leaf folders, although other species … Continue reading →

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Downy Mildew Identified on Hemp (Cannabis sativa) in Southwestern Ontario

Posted on September 22, 2020 by Sean Westerveld

By: Amy Fang Shi, Sean Westerveld, Jim Todd and Melanie Filotas Downy mildew of hemp (also known as cannabis downy mildew) has been identified in multiple hemp fields in southwestern Ontario. The disease first appeared in early September and was … Continue reading →

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Ginseng Crop Update – Dealing with Early Senescence, August 28, 2020

Posted on August 28, 2020 by Sean Westerveld

Given the major stresses experienced by the ginseng crop this year, including early frost damage, hot and dry conditions, and high Alternaria pressures, many gardens are senescing early this year. There are a few things to consider for proper management … Continue reading →

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Miravis Duo Fungicide Registered for Use on Ginseng and Hazelnut

Posted on August 13, 2020 by Sean Westerveld

Syngenta Canada has recently announced that the Miravis Duo fungicide label has been expanded to include the control of Alternaria blight of ginseng and eastern filbert blight of hazelnut, in addition to many other horticultural crops. Miravis Duo consists of … Continue reading →

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Ginseng Crop Update – Protecting Frost Damaged Plants – May 13, 2020

Posted on May 13, 2020 by Sean Westerveld

Varying amounts of damage from the past week’s freeze and snow events are being reported depending on the low temperatures in the area, how emerged the crop is, whether row covers were put on the crop, and how much snow … Continue reading →

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