| Bacterial diseases | |
|---|---|
| Bacterial stem and root rot | Erwinia chrysanthemi |
| Bacterial wilt | Ralstonia solanacearum |
| Crown gall | Agrobacterium tumefaciens |
| Hairy roots | Agrobacterium rhizogenes |
| Little leaf (proliferation disease) | Phytoplasma |
| Miscellaneous diseases and disorders | |
|---|---|
| False broomrape | Uncharacterized |
| Streptomyces soil rot (pox) | Streptomyces ipomoeae |
| Nematodes, parasitic | |
|---|---|
| Brown ring of roots (bulb and stem nematode) | Ditylenchus dipsaci Ditylenchus destructor |
| Burrowing | Radopholus similis |
| Dagger | Xiphinema spp. Xiphinema americanum |
| Lesion | Pratylenchus brachyurus Pratylenchus coffeae |
| Pin | Paratylenchus spp. |
| Reniform | Rotylenchulus reniformis |
| Root-knot | Meloidogyne spp. Meloidogyne arenaria Meloidogyne hapla Meloidogyne incognita Meloidogyne javanica |
| Spiral | Helicotylenchus spp. |
| Sting | Belonolaimus longicaudatus |
| Stubby-root | Paratrichodorus spp. Paratrichodorus minor |
| Stunt | Tylenchorhynchus spp. |
| Viral and viroid diseases | |
|---|---|
| Feathery mottle | Sweet potato feathery mottle virus (SPFMV) |
| Internal cork | Internal cork strain of sweet potato feathery mottlevirus (SPFMV-IC) |
| Latent virus | Sweet potato latent virus (SPLV) |
| Mild mottle | Sweet potato mild mottle virus (SPMMV) |
| Russet crack | Russet crack strain of sweet potato feathery mottlevirus (SPFMV-RC) |
| Sweet potato virus disease (SPVD) | Sweet potato feathery mottlevirus and an uncharacterized whitefly-transmitted agent |
| Yellow dwarf | Sweet potato yellow dwarf virus (SPYDV) |