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thalictrum downy mildew
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Topic: thalictrum downy mildew (Read 773 times)
dewberry
Newbie
Posts: 6
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thalictrum downy mildew
«
on:
September 12, 2023, 09:52:01 AM »
Do thalictrum get aquilegia downy mildew? My thalictrum delavayi didn't flower very well this year. I've just noticed there are brown blotches on the stems.
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MarcR
Hero Member
Posts: 512
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Re: thalictrum downy mildew
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Reply #1 on:
September 12, 2023, 05:02:24 PM »
dewberry,
If it is fungal, a full strength vinegar wash might clear it up. If not try Captan or other commercial fungicide.
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Marc Rosenblum
Falls City, OR USA
I am in USDA zone 8b where temperatures almost never fall below 15F -9.4C. Rainfall 50" 110 cm + but none June-September. We seldom get snow; but when it comes we get 30" overnight. Soil is sandy loam with a lot of humus.
Oregon- where Dallas is NNW of Phoenix
Jeffnz
Sr. Member
Posts: 322
Re: thalictrum downy mildew
«
Reply #2 on:
September 12, 2023, 09:33:27 PM »
I agree with Marc that a fungal spray is needed but your description does not fit with it being powdery mildew.
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thalictrum downy mildew
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