Burning Chemically Treated Seed Corn Not Advised

DES MOINES—Concerns about potentially higher home heating costs and the chill in the air have many Iowans again interested in using corn burners for warmth. For many, this is a safe and reliable heat source, but DNR officials caution against burning chemically treated seed corn, which can release toxic chemicals when burned.

“Shelled corn from local farmers and mills is abundant, cheap, safe and makes burning of chemically treated seed corn an unnecessary risk for home use,” said Christine Paulson, an air specialist with the Department of Natural Resources.

She said many corn burner manufacturers also recommend against using chemically treated seed corn that is pink or red in color and contains captan and other pesticides that can emit toxins when burned.

“Burning treated seed corn can emit low levels of hydrochloric acids and thiophosgene, also known as mustard gas,” she said. “The highest emissions can occur at start up and shutdown when combustion temperatures are lower, or if the unit is damped down.”

“Burning regular corn can be a clean, excellent source of heat using renewable, Iowa grown energy,” she said. “Just avoid chemically treated seed corn, often provided free by companies trying to get rid of old supplies.”

For more information contact Christine Paulson at 515-242-5154.