Author Archives: Sean Westerveld

About Sean Westerveld

Ginseng and Medicinal Herbs Specialist, OMAFRA

Weeds to Watch: Invasive Pigweeds – Waterhemp and Palmer Amaranth

By: Kristen Obeid, OMAFRA Weed Management Specialist – Horticulture Dave Bilyea, Weed Management – Horticulture, University of Guelph, Ridgetown Campus The first line of defense against waterhemp and palmer amaranth is proper identification.  It is EXTREMELY difficult to identify waterhemp … Continue reading

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Ginseng Crop Update – August 3, 2018

The weather has been mostly cloudy and very humid for most of the past week. Combined with moisture stress and previous or continued damage from Alternaria, this has led to the development of Botrytis blight. The humid conditions have allowed … Continue reading

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Lavender Crop Update – July 20, 2018

Lavandin cultivars are in full bloom across the province, while bloom of angustifolia cultivars is starting to wind down. Now is a good time to harvest angustifolias for essential oil. Bundle and bud harvest of lavandins should be winding down, … Continue reading

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Ginseng Crop Update – Dealing with Lingering Alternaria July 18, 2018

Alternaria leaf and stem blight continues to be an issue in the ginseng industry this year. Much of the symptoms occurring now are due to damage earlier in the year, but active disease is still present in some gardens. In … Continue reading

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Irrigation Water Quality and Mitigating Food Safety Risks

By Rebecca Shortt, Kathryn Carter, and Danielle Visschedyk, OMAFRA Irrigation water can contain pathogens, microorganisms that cause illness or death in humans.  Every time contaminated water comes in direct contact with fruit or vegetables, there is a risk that these … Continue reading

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Command Herbicide Registered for Use on Cilantro

Modified from an article written by Jim Chaput, OMAFRA, Minor Use Coordinator, Guelph The Pest Management Regulatory Agency (PMRA) recently announced the approval of minor use label expansion registrations for Command 360 ME Herbicide for management of labeled weeds on … Continue reading

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Guide to Weed Control Hort Crops 2018 – Pub 75B is Now Available

Originally posted on ONfruit:
Kristen Obeid, Weed Management Specialist – Horticulture The OMAFRA Guide to Weed Control Hort Crops 2018 (Publication 75B) is available in the following formats: ENGLISH PRINT VERSION (2018): Go to http://www.blurb.ca/b/8811220 to order a print copy OR …

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