Prices of sugar fell in the key wholesale markets of north India due to subdued demand and selling pressure on mills to clear stocks before the upcoming crushing season. Expectations of a rise in production this season has also dampened the sentiment for the sweetener and is keeping prices subdued. Mills are quoting lower prices to trigger demand as they have to clear stocks before the crushing season starts at the end of October. In other key wholesale markets of Maharashtra, sugar prices remained unchanged amid thin trade.