Weather disease intelligence

Canola sclerotinia and Fusarium head blight risk

Weather-driven risk trend: the past 14 days plus a 10-day forecast.

Location

Ready

Station calibration

Offsets are applied to uploaded station readings before risk is calculated.

Regina, Saskatchewan

Using Open-Meteo weather data.

Canola

Wheat and barley

Canola sclerotinia - Waiting for weather
Wheat FHB - Waiting for weather
Barley FHB - Waiting for weather
FHB infection hours - Temp >=15C and RH >=80%
Weather window - Updates after calculation

Risk trend

How risk is calculated

The dashboard calculates a 0-100 weather risk index. It is not a disease diagnosis or a spray recommendation; it is a decision-support signal for scouting and fungicide timing discussions.

Canola sclerotinia

The index weighs canola flowering stage, canopy density, sclerotinia field history, rainfall in the last 7 and 14 days, wet hours in the last 48 hours and 7 days, relative humidity, and average temperature.

Wheat and barley FHB

The index weighs heading/flowering stage, variety susceptibility, previous crop and residue, and especially FHB infection hours when temperature is at least 15C and RH is at least 80% at the same time. It also considers 7-day rainfall, wet hours, relative humidity, and precipitation probability.

Station calibration

Uploaded station readings can be corrected with temperature and RH offsets. This lets Pessl, RealmFive, or other station data be adjusted before risk and infection-hour calculations are run.

Risk bands

Below 45 is low risk, 45-69 means monitor closely, and 70+ indicates high weather pressure. Always confirm crop stage and field conditions before a fungicide decision.

Lines show a 0-100 risk index. Yellow means monitor closely; red means high risk and a fungicide timing check.

Risk drivers

Higher-risk days

Date Rain 7d FHB 72h FHB 7d Scler. Wheat FHB Barley FHB

Methodology

This is an operational weather index, not a diagnosis. For sclerotinia it weighs canola flowering, canopy density, 7-14 day rainfall, high-humidity hours, and temperature. For Fusarium head blight it weighs crop stage, variety susceptibility, previous crop, FHB infection hours where temperature is at least 15C and RH is at least 80% at the same time, rainfall, relative humidity, and temperature before and during flowering. Uploaded station data can be calibrated with temperature and RH offsets before the risk index is calculated.

Weather source: Open-Meteo. Agronomic thresholds are based on public guidance from the Canola Council of Canada, NDSU/USWBSI, and university extension materials. For a production decision tool, calibrate the coefficients against local field history, varieties, fungicide records, and scouting observations.