Other plant diseases

P Pilidiella Pilidiella P Pink rib P Planistromella disease Planistromella P Plantago asiatica (as a viral infection source) Plantago asiatica C Clubroot Plasmodiophora P Plasmodiophoraceae Plasmodiophoraceae C Clubroot Plasmodiophorida P Plasmodiophoromycetes Plasmodiophoromycetes P Plasmodiophoromycota Plasmodiophoromycota P Platyspora leaf spot Platyspora P Plectosporium blight Plectosporium P Pleospora rot Pleospora putrefaciens P Pleosporaceae Pleosporaceae P Pleosporomycetidae Pleosporomycetidae P Pneumocystidomycetes Pneumocystidomycetes P Poaceicola Poaceicola P Pocheinosis Pocheina P Pink mold Pocheina rosea P Podo viruses Podoviridae P Polymyxa Polymyxa B Beet soil-borne virus vector Polymyxa betae P Polymyxa graminis Polymyxa graminis P Polysphondylium Polysphondylium P Polyspila Polyspila P Porina adflata Porina adflata P Porinaceae lichens Porinaceae P Potato rough dwarf Potato rough P Potato yellow vein Potato yellow P Prymnesiaceae algae Prymnesiaceae P Pseudocochliobolus Pseudocochliobolus P Pseudodidymella blight Pseudodidymella P Pseudodidymellaceae fungal diseases Pseudodidymellaceae H Halo blight of oats Pseudomonas coronafaciens P Pseudomonas maltophilia Pseudomonas maltophilia A Alfalfa leaf spot Pseudopeziza jonesii P Pseudovalsa necrosis Pseudovalsa P Psylosis P Puccinia expansa Puccinia expansa Y Yellow rust Puccinia striiformis V Victoria blight of oats Pyrenophora victoria P Pyrococcus Pyrococcus P Pyrococcus furiosus Pyrococcus furiosus R Radish yellow Radish yellow P Potato wart R Ramularia leaf spot of sorrel Ramularia obovata R Ramularia leaf spot of sorrel Ramularia rumicis-crispi R Ranunculus latent virus Ranunculus latent R Reticularia Reticularia R Root rot Rhizopoda R Rhizopycnis Rhizopycnis R Red algae (Cephaleuros) Rhodophyceae R Red algae Rhodophyta R Rhynchobrunnera Rhynchobrunnera G Golden rhynchosia Rhynchosia golden R Rib discoloration R Rice yellow stunt Rice yellow R Root-lesion nematode R Russeting of apple fruits R Rugulopteryx Rugulopteryx R Rugulopteryx okamurae Rugulopteryx okamurae