What disease was caused by a water mold?

The disease caused by a water mold is known as "potato blight," which is caused by the pathogen Phytophthora infestans. This water mold is responsible for the Irish Potato Famine in the mid-19th century, leading to widespread crop failures and significant social and economic consequences. The blight affects potato plants, causing leaves to rot and tubers to decay, resulting in devastating losses for farmers and food shortages.