This should be Eryphise heraclei. Always found on Foeniculm vulgare (!?!?) in October, even if there are many other Apiaceae species in the wild - although in October many annual species are germinating out.
Eryphise heraclei (or other ?) on Foeniculum vulgare (apiaceae)
- Steve_mt
- Erledigt
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Hallo Steve
I have never seen dumbbell-shaped Konidien in Erysiphe heraclei. Compare with Leveillula lanuginosa.
LG Karl -
Hi Steve,
that's definitely a powdery mildew but I don't think it is Erysiphe heraclei. To be honest, I have no idea what the structures in Congored are...but they don't belong to the mildew. The last pictures (in water?) show the conidia. The dumbell shape is characteristic of Leveillula lanuginosa. You can also try to prepare the mildew with the scotchtape method: Just put some scotch tape on the infect part of the plant, peal it off and put it on a microscope plate. That's particularly useful when you have to judge if conidia are formed in chains or if you need to know the shape of the appressoria.
Björn
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Steve_mt
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