| Nombre científico |
Tipo de plaga |
| Radish mosaic virus |
Virus |
| Ralstonia solanacearum (Smith) Yabuuchi et al. Raza 3 biovar 2 |
Procariota |
| Ramularia armoraciae Fuckel |
Hongo |
| Ramularia bellunensis Speg |
Hongo |
| Ramularia lupini Davis |
Hongo |
| Ramularia onobrychidis Allesch |
Hongo |
| Raspberry bushy dwarf virus |
Virus |
| Raspberry leaf curl virus |
Virus |
| Raspberry ringspot virus |
Virus |
| Raspberry vein chlorosis virus |
Virus |
| Rathayibacter rathayi (Smith) Zgurskaya et al. |
Procariota |
| Rathayibacter tritici (Carlson and Vidaver) Zgurskaya et al. |
Procariota |
| Ravenelia australis Dietel & Neger |
Hongo |
| Ravenelia expansa Dietel & Holw |
Hongo |
| Ravenelia thornberiana Long. |
Hongo |
| Recilia dorsalis (Motschulsky) |
Insectos |
| Red clover necrotic mosaic virus |
Virus |
| Red clover vein mosaic virus |
Virus |
| Rhabdocline pseudotsugae Syd |
Hongo |
| Rhabdoscelus obscurus (Boisduval) |
Insectos |
| Rhagoletis spp. |
Insectos |
| Rhigopsidius tucumanus Heller |
Insectos |
| Rhipiphorothrips cruentatus Hood |
Insectos |
| Rhizoctonia tuliparum Whetzel & J. M. Arthur |
Hongo |
| Rhyacionia buoliana Denis & Schiffermüller |
Insectos |
| Rhyacionia frustrana (Comstock) |
Insectos |
| Rhynchophorus phoenicis (Fabricius) |
Insectos |
| Rice black streaked dwarf virus |
Virus |
| Rice dwarf virus |
Virus |
| Rice gall dwarf virus |
Virus |
| Rice grassy stunt virus |
Virus |
| Rice ragged stunt virus |
Virus |
| Rice stripe virus |
Virus |
| Rice tungro bacilliform virus |
Virus |
| Rice yellow mottle virus |
Virus |
| Rice yellow stunt virus |
Virus |
| Rosellinia arcuata Petch |
Hongo |
| Rubus moluccanus L. |
Maleza |
| Rubus stunt phytoplasma |
Procariota |