Widespread. Not reported from Africa. On cucurbits, including wild species. An important bacterial disease. More serious on watermelon.
Greyish spots on seedlings; those on stem cause death. Fruit infections occur early with dark green areas near harvest, superficial at first, later cracking.
Spread from seed to leaves and then in wind and rain.
Cultural control: certified seed; 2-year crop rotation; check seedlings; disinfect nursery after outbreaks (bleach); grow new crops far from other cucurbits; remove volunteers; use drip irrigation; clean equipment used in diseased fields; tolerant varieties; collect and burn debris after harvest.