Toronto, Canada · 43.65°
Leaf Miners in Toronto
3816 hours in an average year meet every threshold this disease needs in Toronto, peaking in August. Those add up to about 62.2 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: 12–30°C. 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 7 for hours favouring this disease in a year.
Watch it before you act
At this level the damage rarely costs the crop. Note the date, check twice a week, and act only if it reaches new growth or the weather turns favourable for it.
Scout the planting while temperatures hold between 12°C and 30°C.
Carried by insects. An insect moves it plant to plant, so controlling the carrier matters as much as treating the symptom. Check for the vector before assuming the plants infected each other directly.