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Author Archives: Sean Westerveld
Ginseng Crop Update – Alternaria, Irrigation and Fertility – June 7, 2023
Foliar Diseases Dry weather conditions and low humidity during warm periods have reduced the risk of most diseases of ginseng. However, frost damage in some gardens and plant stress due to dry conditions can result in increased risk of Alternaria … Continue reading
Lavender Crop Update – May 26, 2023
There have been several frosts over the past week. Although it was probably not cold enough to cause major damage in most areas, it is possible flower buds may have been affected if you are in a particularly frost prone … Continue reading
Posted in Herbs, Lavender
Tagged Fertility, Frost, Insects, Lavender, Nitrogen, Pest Control Products, Pest Management
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Ginseng Crop Update – May 25, 2023
It looks like most areas escaped a frost last night, mostly due to a breeze that continued all night that mixed up the air. There is a slight risk again tonight with calmer air, but forecast dewpoints are +1C for … Continue reading
Posted in Ginseng, Ginseng Pest Management, Ginseng Production
Tagged Diseases, Frost, Ginseng, herbicide, herbicide injury, Insects, Pest Management
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Frost Potential for Ginseng May 25 and 26, 2023
Here we go again on the risk of frost for the ginseng growing areas. The risk appears to be lower at this time but the forecast dewpoint on Weather Underground for Delhi is -1C. Low temperatures are forecast to be … Continue reading
Understanding Frost Risks for Lavender – May 16, 2023
I have had several inquiries about the potential for frost damage to lavender from the frost events in the forecast because of previous events that devastated lavender in some areas. Spring frost damage is relatively rare in lavender. I am … Continue reading
Risk of Frost for Ginseng this Week – Plan Now – May 15, 2023
Although the weather forecasts generally still show low temperatures above freezing every night this week in the ginseng production area (as of Monday at noon), the risk of frost especially Wednesday night is relatively high. This is because of the … Continue reading
Posted in Ginseng, Ginseng Pest Management, Ginseng Production
Tagged Diseases, Frost, frost protection, Ginseng
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