Paris, France · 48.86°
Crown Gall in Paris
466 hours in an average year meet every threshold this disease needs in Paris, peaking in August. Those add up to about 21.2 sustained favourable spells a year, and it is the spells rather than the scattered hours that lead to infection.
Risk in Paris, next 48 hours
When conditions favour it in Paris
Hours in an average month when conditions meet every threshold this disease declares (2021–2025). Faded bars are months the database does not list the problem as active.
This disease's thresholds: 20–30°C · humidity ≥60%. Every hour in the archive was tested against them.
These come from the ERA5 reanalysis on a roughly 9 km grid, so they describe the area rather than your plot. A shaded, sheltered corner holds leaf wetness longer than open ground, so conditions there can favour it more often than the figure suggests. This is a climate profile, not a forecast — the panel above carries the current risk.
How this compares
Of the 13 locations published here, Paris ranks 7 for hours favouring this disease in a year.
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.
Scout the planting while temperatures hold between 20°C and 30°C, with humidity above 60%.
Tools, hands and cuttings. It travels on secateurs, stakes, gloves and propagation material. Work through healthy plants first and disinfect tools between plants.