Powdery mildew

O Ophiostoma sapstain Ophiostoma penicillatum O Oak vascular mycosis Ophiostoma piceae B Blue stain Ophiostoma piliferum O Ophiostoma blue stain Ophiostoma pluriannulatum O Ophiostoma quercus oak disease Ophiostoma quercus P Pine blue stain Ophiostoma serpens O Oak Ophiostoma wilt Ophiostoma subannulatum O Ophiostomataceae fungi Ophiostomataceae O Ophiostomatales Ophiostomatales O Orbicula Orbicula O Orbicula parietina Orbicula parietina O Orbilia Orbilia O Orbilia xanthostigma Orbilia xanthostigma O Orbiliaceae Orbiliaceae O Orbiliales Orbiliales O Orbiocrella Orbiocrella O Orbiocrella petchii Orbiocrella petchii O Ossicaulis Ossicaulis O Osteina Osteina O Ostracoderma disease Ostracoderma O Ostracoderma pulvinatum Ostracoderma pulvinatum O Ostropa Ostropa O Ostropa barbara Ostropa barbara O Ostropales Ostropales O Ostropomycetidae Ostropomycetidae O Otidea Otidea O Otidea concinna Otidea concinna H Hare's ear Otidea leporina H Hare's ear Otidea onotica O Otthia canker Otthia O Otthia spiraeae Otthia spiraeae O Oudemansiella Oudemansiella P Porcelain fungus Oudemansiella mucida O Ovatosporosis Ovatospora O Ovatosporosis Ovatospora brasiliensis O Ovulariopsis Ovulariopsis O Ovulinia Ovulinia O Oxyporus Oxyporus P Pachnocybaceae infection Pachnocybaceae P Pachnocybales Pachnocybales P Pachnocybe Pachnocybe P Pachnocybe grisea Pachnocybe grisea P Pachyascaceae Pachyascaceae P Pachyascus Pachyascus P Pachyascus lapponicus Pachyascus lapponicus P Pachyella Pachyella P Pachyella babingtonii Pachyella babingtonii P Pachyella violaceonigra Pachyella violaceonigra P Pachymetra root rot Pachymetra P Pachymetra root rot Pachymetra chaunorhiza P Pachyphlodes Pachyphlodes P Pachyphlodes citrina Pachyphlodes citrina P Pachyramichloridium Pachyramichloridium P Pachyramichloridium pini Pachyramichloridium pini P Pacispora Pacispora P Pacispora scintillans Pacispora scintillans P Pacisporiaceae Pacisporiaceae P Paecilomyces infection Paecilomyces P Paecilomyces farinosus Paecilomyces farinosus P Paecilomycosis Paecilomyces formosus