Verticillium 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 18°C and 27°C, with humidity above 60%.
The signs that lead here
Full problem lists for these crops
About
Verticillium wilt (Verticillium dahliae) is a cool-season soil-borne wilt with a very wide host range including tomatoes, potatoes, maples and many trees, clogging vascular tissue and persisting in soil for over a decade.
Symptoms
V-shaped yellow wedges at leaf margins, wilting during the heat of the day, and tan-to-brown streaking in the wood when a stem is cut. Often progresses slowly over a season.
Organic Treatment
No cure; remove severely affected annuals. Keep woody plants vigorous with mulch and balanced watering. Solarise beds and rotate to non-hosts.
Chemical Treatment
No effective fungicide; manage with resistant varieties and soil health.
Prevention
Use resistant cultivars, rotate with cereals or grasses, avoid wounding roots, and do not replant susceptible species in known infested sites.
Crops at risk
Related problems
Verticillium 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.