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Margot en Geert Vullings

On February 9, 2026, we found these small hairy di

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Margot en Geert Vullings

On a barkless poplar branch, we found hairy discs

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Tomaz Vucko Tomaz Vucko

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Erysiphales - Spore Sizes for 5 Species
Peter Thompson, 10-09-2012 20:27
Hello Everyone,

I would be very grateful to receive details about the spore sizes for the following five species:

Erysiphe alphitoides / Microsphaera alphitoides
Erysiphe aquilegiae var. ranunculi
Erysiphe heraclei
Erysiphe ulmariae
Erysiphe sordida / Golovinomyces sordidus

I have checked the available information in the Braun 1987 Erysiphales drawings, but they do not contain spore data. 

Thanking you in advance,
Peter.
Chris Yeates, 11-09-2012 21:53
Chris Yeates
Re : Erysiphales - Spore Sizes for 5 Species
Hello Peter

here you go:

regards
Chris
Peter Thompson, 12-09-2012 19:49
Re : Erysiphales - Spore Sizes for 5 Species
Hello Chris,

Thank you for the spore sizes. I will now be able to complete the drawings and microscopic data section for the powdery mildews.

My progress has been good, and I am still hoping to have everything ready next month.

Best wishes,
Peter.