Peach Leaf Curl
Risk near you, next 48h
See whether your local forecast favours this disease right now.
When it strikes
Treat, then re-check in 5–7 days
Pick off the worst material, apply the organic option below, and look again after five to seven days. If the spread continued, escalate rather than repeating the same treatment.
Rain and irrigation splash
Water splashing off soil and infected leaves carries it upward and along the row. Watering at the base and mulching the soil surface break the route.
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 7°C and 19°C, with humidity above 85%, after rain or heavy dew, while the leaves are still wet. Risk builds after roughly 10 unbroken hours of those conditions, so the morning after such a night is the moment to look.
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
Peach leaf curl (Taphrina deformans) infects peach and nectarine trees during cool, wet spring weather as buds swell, distorting new growth and weakening trees over years.
Symptoms
Thickened, puckered, red-to-purple curled new leaves that later turn powdery white and drop; reduced fruit set and twig dieback.
Organic Treatment
Apply copper or lime sulfur as a dormant spray in late winter before buds swell — the single most effective measure. Remove distorted leaves.
Chemical Treatment
Chlorothalonil or copper applied at leaf fall and again before bud swell.
Prevention
Spray during dormancy every year, plant resistant varieties, and keep trees vigorous. Timing is critical — once leaves emerge it is too late.
Crops at risk
Related problems
Peach Leaf Curl 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.