Tag Archives: Diseases

Basil Downy Mildew Confirmed in Ontario – July 28, 2020

Basil downy mildew has been confirmed in a home garden in Norfolk County. The symptoms first appeared in the past days, which means infection probably occurred over a week ago. It is likely that the disease is present in most … Continue reading

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Fungicide Resistance in Alternaria? Ginseng Crop Update July 17, 2020

With the persistent heat and dry conditions so far this summer, ginseng is stressed, and root development will be reduced. These conditions are also ideal for Alternaria development and spread. As a result, problems with Alternaria are continuing in many … Continue reading

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Experiencing Strange Symptoms on Lavender? Lavender Crop Update July 10, 2020

Lavandula angustifolia cultivars are in full bloom in most of Ontario, with lavandins starting to bloom further south. Some cultivars are already past peak, progressing through bloom faster due to the hot conditions. It is becoming very dry in most … Continue reading

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Ginseng Crop Update – Pre-Plant Nematode Management – June 24, 2020

Ginseng Crop Update Alternaria remains the biggest challenge for most growers. The problem stems from freeze damage/stunting in May and ideal weather conditions for Alternaria – hot and dry with long dew periods. With insufficient rains over the past few … Continue reading

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Rovral Re-Evaluation Update

At the time of publishing the Crop Protection Guide for Ginseng , OMAFRA Publication 847, communications from both PMRA and the registrant of Rovral (FMC) suggested that growers had 3 years from the re-evaluation decision date (up to June 21, … Continue reading

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Ginseng Crop Update – Alternaria Management – June 5, 2020

With ginseng plants stressed from prolonged cold and/or freeze damage in many fields, they are more susceptible to foliar diseases including Botrytis and Alternaria leaf blights. Combined with ideal warm, dry and humid conditions for Alternaria, the risk of Alternaria … Continue reading

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