Bacterial wilt may refer to:
- Erwinia tracheiphila - a disease of cucurbits disease mainly affecting cucumber and muskmelon plants. Watermelons are immune.
- Ralstonia solanacearum - a plant pathogenic soil bacterium causing a bacterial wilt in a very wide range of potential host plants. Also known as "brown rot", "southern bacterial wilt" and "Granville wilt" when it occurs in tobacco.