| A number of diseases caused by viruses and bacteria are transmitted by insects. In that case, the disease is then listed both in the table of insects and also in the table of viruses and bacteria below. |
| French name | English name | Causer | Course | Characteristic diseased part | Main features | Status |
|---|---|---|---|---|---|---|
| Galle du collet | Crown gall | Bacteria: Agrobacterium tumefaciens and Agrobacterium vitis. Synonyms: Rhizobium vitis; Rhizobium radiobacter | Stem | Formation of tumours on stem, sometimes on roots and tendrils | ||
| Maladie de Pierce de la vigne | Pierce disease | Bacteria: Xylella-fastidiosa | Glassy winged sharpshooter transmits the bacteria when eating the leaf. | Leaf | Leaves die and plant dies | not in France; mainly North and South America. |
| Court noué | Grape fan leave (virus) ; Xiphinema index (worm); dagger nematode. | Virus, transmitted by a worm: Xiphinema index; Xiphinema diversicaudatum | virus-infected worm eats root tips and transmits virus; Xiphinema index transmits fan leave virus and Xiphinema diversidaudatum the Arabic Mosaic Virus | Leaf, as well as stems and grapes | Decolourisation of leaves in fan shape. | |
| Flavescense dorée | Grapevine yellows; l eafhopper | Bacteria: transmitted by a cicada: Scaphoideus titanus | Bacterially infected cicada (Scaphoideus titanus) transmits Phytoplasma vitis across | Leaf | Leaf discolours, hardens and rolls up; plant dies |
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