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Smaller plants are at higher risk of Phoma developing into canker

Phoma moves faster in warmer conditions. Disease spread on the leaf gets progressively quicker between 3°C and 15°C. Early season small leaves are at higher risk and require greater Phoma protection.

OSR leaf graph

Phoma stem canker identification

Last season’s infection will inevitably have an impact on yield this harvest. But it also poses a serious risk for the new crop this autumn.

Old crop cankers, mixed in with the stubble trash, will be the source of infective spores. Rain events over the autumn trigger continuous further spore release and infection events.

Can you spot cankers?

Innovation Centres

Oilseed rape growers should be on the lookout for cankers on the stems of this season’s crop, to assess the success of last year’s treatments and calculate the risk to plants ov...

Fungicide programme for managing Phoma