| Nombre científico |
Tipo de plaga |
| Bactrocera Macquart |
Insectos |
| Balansia oryzae-sativae Hashioka |
Hongo |
| Banana bunchy top virus |
Virus |
| Baris granulipennis Tournier |
Insectos |
| Barley stripe mosaic virus |
Virus |
| Barley yellow mosaic virus |
Virus |
| Barley yellow striate mosaic virus |
Virus |
| Basidiophora entospora Roze & Cornu |
Oomycetes |
| Bathycoelia thalassina (Herrich-Schäffer) |
Insectos |
| Bean leafroll virus |
Virus |
| Bean pod mottle virus |
Virus |
| Bean yellow mosaic virus |
Virus |
| Beet curly top virus |
Virus |
| Beet leaf curl virus |
Virus |
| Beet necrotic yellow vein virus |
Virus |
| Beet pseudoyellows virus |
Virus |
| Beet western yellows virus |
Virus |
| Beet yellows virus |
Virus |
| Belladonna mottle virus |
Virus |
| Bidens aurea (Ait) Sherff |
Maleza |
| Bionectria ochroleuca (Schwein.) Schroers & Samuels |
Hongo |
| Bipolaris heveae (Petch) B.A. Khasanov |
Hongo |
| Bipolaris incurvata (C. Bernard) Alcorn |
Hongo |
| Bixadus sierricola (White) |
Insectos |
| Black raspberry necrosis virus |
Virus |
| Blosyrus ipomoeae Marshall |
Insectos |
| Blueberry leaf mottle virus |
Virus |
| Botryosphaeria disrupta (Berk. & M.A. Curtis) Arx & E. Müll |
Hongo |
| Botryotinia narcissicola (P.H. Greg.) N.F. Buchw |
Hongo |
| Botryotinia porri (J.F.H. Beyma) Whetzel |
Hongo |
| Botryotinia squamosa Vienn.-Bourg |
Hongo |
| Botrytis anthophila Bondartsev |
Hongo |
| Botrytis tulipae Lind |
Hongo |
| Brenneria quercina (Hildebrand and Schroth) Hauben et al. |
Procariota |
| Brenneria salicis (Day) Hauben et al. |
Procariota |
| Brevipalpus californicus (Banks) |
Ácaros |
| Brevipalpus chilensis Baker |
Ácaros |
| Brevipalpus lewisi McGregor |
Ácaros |
| Broad bean wilt virus |
Virus |
| Broccoli necrotic yellows virus |
Virus |
| Bromus diandrus Roth |
Maleza |
| Bromus madritensis L. |
Maleza |
| Bromus rubens L. |
Maleza |
| Bromus sterilis L. |
Maleza |
| Brontispa longissima (Gestro) |
Insectos |
| Bruchus rufimanus Boheman |
Insectos |
| Bryocoropsis laticollis Schumacher |
Insectos |
| Burkholderia caryophylli (Burkholder) Yabuuchi et al. |
Procariota |
| Bursaphelenchus xylophilus (Steiner & Bührer) Nickl |
Nematodo |
| Busseola fusca (Fuller) |
Insectos |