Fusarium Wilt
Risk near you, next 48h
See whether your local forecast favours this disease right now.
When it strikes
Remove affected material now
Take out the affected leaves, shoots or whole plants before the next wet spell, bag them as you cut, and wash your hands and tools before touching healthy plants.
Soil and crop debris
It waits in the ground or in last season's debris, so removing the plant does not clear the bed. Rotation and debris removal are the working controls.
It carries over to next season in soil, debris or seed — which is why rotation matters here, not just treatment.
Keep out of the compost
This survives a garden heap. Bag it for municipal green waste, which is composted industrially at temperatures a garden heap cannot reach, or burn it where that is permitted.
When and where to look
Scout the planting while temperatures hold between 25°C and 34°C, with humidity above 60%.
Rule these out first
Same category, and at least one host crop in common — so they are genuinely confusable in the same part of the garden.
The signs that lead here
Full problem lists for these crops
About
Fusarium wilt (Fusarium oxysporum) is a soil-borne fungus that plugs the water-conducting tissue of tomatoes, melons, bananas and many crops, thriving in warm soils and persisting for years.
Symptoms
Yellowing and wilting often on one side of the plant or one branch, progressing upward; brown discoloration inside the lower stem when cut; eventual collapse despite moist soil.
Organic Treatment
There is no cure once infected; remove and destroy affected plants. Solarise soil, add compost to boost suppressive microbes, and graft onto resistant rootstock.
Chemical Treatment
No effective curative fungicide; rely on resistant varieties and soil fumigation in commercial settings.
Prevention
Plant resistant cultivars (look for the F code on tomatoes), rotate crops, maintain near-neutral pH, and avoid moving infested soil.
Crops at risk
Related problems
Fusarium Wilt risk by location
Each location has a month-by-month profile computed from the weather archive: how many hours a year actually meet this disease’s thresholds.