Problem: Sclerotium Blight
This plant disease, also called southern blight, is caused by a fungus (Sclerotium rolfsii) that is prevalent in southern soils. The fungus primarily attacks cool-season grasses planted in hot-summer regions, but it may attack bermudagrass and dichondra lawns. It also infects many plants besides these grasses. The disease occurs primarily in lawns that have an accumulation of thatch.
Sclerotium blight occurs primarily in lawns that have an accumulation of thatch. Remove thatch regularly. Keep the lawn growing vigorously by watering and fertilizing properly.