Ampelomyces quisqualis on Podosphaera

[JennyS]

Found on Pyrus communis leaves today and I thought possibly Podosphaera until I looked under the microscope…….

Turns out the brown mycelium is Ampelomyces quisqualis, a hyperparasite of powdery mildews

[attachment=5]z Q 190427 006 Pyrus.jpg[/attachment]

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[attachment=1]z Q 190427-1 Pyrus.jpg[/attachment]

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[Chris Yeates]

Hi Jenny

nice find and very nice material. I suspect that there may be a lot of host-related crypto-species in this area. I have found a similar fungus on Erysiphe euonymi-japonici, the very common powdery mildew on japanese spindle. Molecular studies have shown that the Ampelomyces/Cicinobolus group is closely related to the common (though easily overlooked) parasite on rust uredinia Eudarluca caricis, which you may well know: http://fungi.myspecies.info/all-fungi/eudarluca-caricis” class=”bbcode_url”>http://fungi.myspecies.info/all-fungi/eudarluca-caricis. The latter also appears to be a complex of host-related species.

I’ll send you a relevant section of the Yorkshire Mycota I’m busy putting together which may be of some interest.

best wishes

Chris

[JennyS]

Many thanks for the reply Chris, and for your email.

I’ve come across Eudarluca caricis a couple of times (on Melampsora populnea and M. euonymi-caprearum) but might well have missed or not been able to identify it previously

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