07/15/2025
Sclerotinia (White Mold) is a fungal disease caused primarily by Sclerotinia sclerotiorum.
π¦ What It Is:
- A soil-borne fungus that produces sclerotia β hard, black, seed-like structures that allow the fungus to survive in the soil for several years.
- Commonly known as white mold due to the fluffy, white fungal growth seen on infected tissues.
π What to Watch For:
- White, cottony fungal growth on stems, pods, or leaves β especially in the crop canopy.
- Premature wilting or lodging of plants.
- Bleached, shredded stems near the base.
- Presence of black sclerotia inside stems or on the soil surface.
π¦οΈ Favourable Conditions:
- Cool, wet, and humid weather during flowering.
- Dense crop canopies that restrict air flow and trap moisture.
- Prolonged periods of leaf wetness and humidity, especially after rain or irrigation.
π± Why It Matters:
- Can cause significant yield loss and quality reduction.
- Particularly damaging in years with frequent rains during flowering.
- Once established, it's difficult to control and can persist in the soil for years.
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Petal testing is a powerful in-season diagnostic tool used in canola crops to detect the presence of Sclerotinia (white mold) spores before symptoms appear.
Hereβs why itβs worth your time:
β
Early Disease Detection
By testing canola petals during early to mid-flower (20β50% bloom), you can determine if Sclerotinia risk is high β before visible damage occurs.
β
Targeted Fungicide Application
Petal tests help you make informed spray decisions, applying fungicide only when needed β saving you money and protecting your crop at the right time.
β
Improved Yield Protection
Sclerotinia infection during flowering can significantly reduce yield. Knowing spore levels allows for timely intervention to reduce losses.
β
Field-Specific Data
Results are localized to your farm, giving you a better picture than general regional forecasts.