Author Archives: Sean Westerveld

About Sean Westerveld

Ginseng and Medicinal Herbs Specialist, OMAFRA

Foliar Diseases of Outdoor Hemp (Cannabis sativa) and Their Management 2021

As canopies begin to close in hemp fields and dew periods lengthen, the risk of foliar diseases of hemp increases. The recent wet weather in much of southern Ontario also increases the risk of most diseases in the field. There … Continue reading

Posted in Fibre Crops, Industrial and Misc. Crops, Industrial Hemp, Oil Crops, Other Industrial Crops | Tagged , , , , | Leave a comment

Basil Downy Mildew Confirmed in Ontario

Basil downy mildew has been identified in both Norfolk and Wellington Counties on July 19. Infections probably began sometime last week. It is likely the disease is now widespread in southern Ontario and basil growers need to protect the crop … Continue reading

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Lavender Crop Update – Dying Lavender July 15, 2021

There are have been multiple reports of lavender suddenly dying over the past few weeks. Symptoms match those of Phytophthora root rot, with portions of plants wilting and dying with other portions still appearing healthy. However, samples of these plants … Continue reading

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Ginseng Crop Update – Wet Weather and Phytophthora – July 15, 2021

It has been a very wet month in southern Ontario, with especially damp conditions over the past 7 days. There has been approximately 134 mm of rain in Delhi, 148 mm in Port Dover, 112 mm in London and 146 … Continue reading

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Aprovia® Top Fungicide label expanded via Minor Use Program to help manage Alternaria blight on ginseng

By Josh Mosiondz, Minor Use Coordinator, OMAFRA The Pest Management Regulatory Agency (PMRA) recently announced the approval of a minor use label expansion registration for APROVIA® TOP Fungicide for control of Alternaria blight (Alternaria panax) on ginseng in Canada. APROVIA® TOP Fungicide … Continue reading

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Lavender Crop Update – June 24, 2021

Harvest Considerations Most angustifolia cultivars of lavender have begun to bloom this week in the south. Full bloom will likely occur within the next week to 10 days. Early bloom is the time to harvest for bundles and buds. Ideally, … Continue reading

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