Sorghum growers are being warned about a fungus that could render stock feed useless.
Ergot is an air-borne disease that flourishes in wet conditions and could strike crops planted in southern Queensland over the next few months.
Dr Malcolm Ryley from the Department of Employment, Economic Development and Innovation says late season crops are particularly vulnerable.
"Really in southern Queensland planting sorghum from now on puts that sorghum at higher risk," he said.
"It will be flowering in early April when conditions are a lot cooler as well, which can make the ergot issue a lot worse."