Top Crop Manager

News Corn Diseases
2020 OMAFRA corn ear mould/DON survey results in


October 19, 2020
By Top Crop Manager

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The results are in from the annual Ontario corn ear mould and deoxynivalenol (DON) mycotoxin survey.

The survey was conducted from Sept. 23 to Oct. 2 by the Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA), in collaboration with the Grain Farmers of Ontario and members of the Ontario Agri-Business Association.

Ben Rosser, OMAFRA corn specialist, and Albert Tenuta, OMAFRA field crop pathologist, have written a summary of this year’s findings. One major take-away: of the 245 ear corn samples taken, 89 per cent of samples tested low (less than 2.00 parts per million (ppm)) for DON – in line with long-term survey averages.

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As well, while insect feeding damage was lower than many past years, it was often associated with greater visual ear moulds. Several of the samples with higher DON concentrations showed damage. |READ MORE