29-04-2015 11:36
Jean-Louis JALLA
Bonjour à tous.Je sollicite votre aide pour ce pe
28-04-2015 20:35
Zuzana Sochorová (Egertová)
Hello,please, are the structures I observed in med
28-04-2015 00:14
Andrew N. Miller
Not a Chaetosphaeria. Not a Hilberina. Any ide
24-04-2015 14:49
Dragiša SavicI found it on Galium mollugo, about 1mm tall, does
27-04-2015 15:43
Nina FilippovaHello dear Forum.This very early species was found
Sur bourgeon de Rhododendron. Je suis pratiquement certain qu'il s'agit de Pycnostysanus azaleae mais comme c'est la première fois que je le vois, je souhaiterais une confirmation.Conidies variables de forme : ellipsoïdes, subglobuleuses, citriformes, fusoïdes… : 5,5-11x5-5,5
Bernard
Dear Bernard,
your determination is correct. The species is quite common on cultivated Rhododendron and is transfered by the cicada Graphocephala fennahi (which is quite beautiful!).
Regards from Lothar
Thank you for your confirmation, to update the name of the fungus and the name of the cicada responsible for the appearance of the fungus!
Sincerely,
Bernard
Hello All,
Looks like this disease of Rhododendrons is spreading. It occurs regularly each year on a hybrid shrub in our garden in North Argyll, Scotland.
What is a puzzle, is what is the transmission agent as we are definitely not within range of Cicadas!
Kind regardes,
Peter
We're in range - Graphocephala fennahi (Graphocephala coccinea) is a leafhopper related to cicada's: http://scholar.lib.vt.edu/ejournals/JARS/v34n4/v34n4-wheeler.htm
And yes, a very distinctive looking beastie!
With regards,
Jenny