Thieves using at least a dozen large trucks struck at a farm in central Quebec overnight Tuesday, making off with an estimated 400 tonnes of the product.
The farmer who owns the crop estimates the value of the theft at $140,000.
The unidentified farmer says the corn had been stored in silos at the farm located about 130 kilometres northeast of Montreal.
Thieves broke locked fences to get onto the property in St-Leonard-d'Aston and then neutralized the alarm system, even shorting out surveillance cameras.
Corn prices have increased significantly in recent months because of a drought in the United States last summer.
The corn heist is the latest bizarre agricultural theft in Quebec.
About 16,000 barrels of maple syrup were stolen from a warehouse in St-Louis-de-Blandford earlier this year.