Canadian Science Publishing After PEI, Manitoba is Canada's largest potato-producing province. Over 1200 million pounds are processed here each year on about 80 thousand acres. A PinP photo. Desiccating summer heat, brought on by climate change, could have adverse effects on Canada's potato industry. In a recent study, researchers examined the heat stress response of 55 potato varieties to estimate how they might fare under changing climate conditions. The news is not good. Details here.