Deoxynivalenol (DON) infections were widespread in Ontario’s corn crop last year.

Down with DON: a clear corn crop

Toxin levels are lower this year thanks to weather and farmer and supplier vigilance

The Ontario corn ear mould and mycotoxin survey showed levels are considerably lower than 2018 with 96 per cent of samples testing less than two parts per million of deoxynivalenol […] Read more


“I got rid of most of it basically at harvest. I didn’t really store any.” – Maurice Chauvin.

Where did all the DON corn go?

Most infected corn in Ontario has now been flushed to markets in ethanol and around the world, mostly at discounted prices

Last year’s deoxynivalenol (DON)-infected corn crop has been successfully sold and shipped — albeit at discounted returns for farmers. The specific destinations of that corn, discounts endured by producers and […] Read more


The lengthier and heavier the mycotoxin exposure, the more toxic the feed.

The DON year and dairy feed

Dairy farmers have had to manage higher mycotoxin levels in feed after last harvest. Here’s how they did it

Dairy farmers faced challenges dealing with mould in corn in 2018, as crop farmers dealt with the widespread DON outbreak. Dairy animals can manage mould levels in small doses but […] Read more

DON caused by corn ear infections significantly reduced the value of the 2018 Ontario corn crop.

DON-forecasting tool funded

Governments help to pay costs to set up computerized monitoring system

The federal and provincial governments are supporting the creation of an early-warning and risk assessment system for deoxynivalenol (DON). Grain Farmers of Ontario is leading the project which will work […] Read more



After a disastrous vomitoxin outbreak, the Ontario Corn Committee is implementing a testing program that farmers have wanted for years. But will companies participate?

DON corn testing: A new era begins

After a disastrous vomitoxin outbreak, the Ontario Corn Committee is implementing a testing program that farmers have wanted for years. But will companies participate?

Ontario corn farmers have been relying on their own observations and those of their neighbours along with scant information from corn companies to make hybrid selections that lower their risk […] Read more