Toronto, Canada · 43.65°
Corn Smut in Toronto
171 hours in an average year meet every threshold this disease needs in Toronto, peaking in July. Those add up to about 14.2 sustained favourable spells a year, and it is the spells rather than the scattered hours that lead to infection.
Risk in Toronto, next 48 hours
When conditions favour it in Toronto
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: 26–34°C · dry air ≤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, Toronto ranks 9 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 26°C and 34°C, in dry air below 60%.
Wind-blown spores. Spores travel on air well beyond the affected bed, so a neighbouring garden can be the source. Spacing and airflow matter more than distance from your own infected plant.