Category Archives: Ginseng Pest Management

Ginseng Crop Update – Pests – June 20, 2025

Alternaria After a prolonged cool and damp (but not wet) period, temperatures are about to rise dramatically. Combined with some frost damage and canopy stunting due to the long, cool period, this will greatly increase the risk of Alternaria leaf … Continue reading

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Ginseng Crop Update – Frost, Rhizoctonia, and Leaf Folders – May 30, 2025

Frost In the last crop update, I commented on how much colder the temperatures were at Delhi than the forecast the night before. Since then, there have been several nights with temperatures several degrees Celsius colder at Delhi than at … Continue reading

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Spotting Rhizoctonia at Home: A Quick and Easy Test for Ginseng Growers

By: Amy Shi, Research Associate, Ontario Ginseng Growers Association Rhizoctonia is showing up in ginseng gardens. The symptoms of Rhizoctonia crown rot in ginseng include expanding circles (up to 1 m in diameter) of collapsing tops that often arch over … Continue reading

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Ginseng Crop Update – Dealing with Frost and Leaf Folders – May 15, 2025

Frost Risk Once again, a cold snap at the end of the long weekend and into next week could bring the risk of frost to frost-prone areas. As of May 15, none of the forecasts show freezing conditions, and dewpoints … Continue reading

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Vayantis Seed Treatment Registered for Use on Ginseng, Herbs, Spices, and Many Other Crops

The Pest Management Regulatory Agency recently announced a label expansion for Vayantis Seed Treatment for the control of seed rot and pre-emergence damping-off caused by Pythium spp. on a wide range of crops, including ginseng, culinary herbs listed within any … Continue reading

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Ginseng Crop Update – Leaf Folders & Forecasting Frost Events – May 8, 2025

Time to Spray for Leaf Folders Last year, some growers saw an explosion of leaf folders that caused considerable damage. By the time growers noted the problem, it was too late to control them. This is because leaf folders, unlike … Continue reading

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