“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 timing of sales have varied. Why it matters: The past six months show large volumes of vomitoxin-infected corn can be moved despite reduced returns for […] 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 once levels reach a certain point, the feed becomes toxic. Why it matters: Mouldy feeds can typically cause performance losses of five to 10 per […] 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 similarly to a DON-forecasting system in place for years for wheat in the province. That system monitors weather conditions to predict DON risk, which helps […] Read more

Corn salvage benefits will start in the future at lower DON parts per million than the current program.

Province, federal government announce corn salvage benefit

Program will gives farmers more options when corn quality is poor in the future

Farmers should have more salvage benefit options in future years if they have a serious corn quality problem like this year’s DON challenges. The federal and provincial governments recently announced a new tiered corn salvage benefit that will be introduced to production insurance plans. This is in response to requests from farmers who, as a […] Read more

Farmers have been challenged by an inability to market lower-quality corn after last year’s harvest.

Loan program gets extension, funding boost

Changes made to the Commodity Loan Program to help deal with DON-infected corn financial challenges

Changes to the Commodity Loan Program (CLP) have been made to help farmers dealing with extreme harvest issues across the province. Grain Farmers of Ontario (GFO) asked for an extension back in November to assist farmers across the province managing challenges with corn crop quality this year. Why it matters: The CLP changes will help […] Read more


Infection of corn by disease like Gibberella that leads to DON problems has to have specific conditions.

The DON to come – agronomic lessons from 2018

Farmers have new information to consider on hybrid selection, fungicide timing

The vomitoxin problem in Ontario’s 2018 corn crop was more severe than most years and continues to cause problems for producers and buyers. However, the fungus-fostering conditions that caused the issue offer agronomic lessons for managing deoxynivalenol (DON) risk. According to Dale Cowan, senior agronomist and sales manager for AGRIS Co-operative and Wanstead Farmers Co-operative, […] Read more

Corn infected with deoxynivalenol (DON) was more widespread than usual this year in Ontario’s crop.

Corn hybrid testing for DON needs industry support

There is currently no screening program for susceptibility to DON for corn in Ontario

Farmers continue to search for better ways to manage risk of an outbreak of deoxynivalenol (DON) in future corn crops. One of the areas of most interest is figuring out which corn hybrids are most susceptible to infection. There is currently no screening program for vomitoxin in corn hybrids in Ontario. Why it matters: Finding […] Read more

Corn has been discounted across much of Ontario because of high levels of DON. There are challenges in marketing especially high infection level corn.

How the new DON testing cost-share program works

Funds will share half of the cost of DON testing or equipment purchase so farmers can know what they have in their bins

With vomitoxin (DON) levels prevalent in this year’s corn crop, the Ontario Soil and Crop Improvement Association (OSCIA) says a new DON testing cost-sharing initiative will help producers strategically market their grain. Why it matters: OSCIA says the cost-sharing program will help farmers know how severe their deoxynivalenol (DON) issues are, and how to market […] Read more


There remains a significant amount of DON-infected corn in fields in Ontario.

Governments promise help for farmers with DON-infected corn

There are few details yet for the federal-provincial program

The federal and provincial governments have announced steps to help Ontario corn farmers hit by high deoxynivalenol (DON), in their crop through the Canadian Agricultural Partnership. Why it matters: Corn farmers in Ontario are continuing to try to get their corn harvested, while dealing with serious quality issues that depending on geography and local buyers, […] Read more

Markus Haerle, chair of the Grain Farmers of Ontario board of directors.

GFO letter addresses corn quality situation

Editor’s note: Grain Farmers of Ontario has issued an open letter to its members addressing some of the challenges with DON-infected corn in Ontario and frustrations boiling to the surface from some farmers. Here’s what it says: An open letter to our GFO farmer-members We are facing one of the most severe outbreaks of DON […] Read more