Fusarium blight is common and often serious in bluegrass. It's less of a problem in red fescue and bent grasses. The disease is most likely to occur in the central states and the Northeast, especially in hot, dry, windy weather. Small tan spots appear in the early summer and may join together. The crown of dead plants can appear brown or black. Nematodes and other fungi may also be involved. Use resistant seed or sod--'Adelphi,' 'Parade,' or 'Sydsport.' It's also a good idea to use 20-percent-improved perennial ryegrass. Water it thoroughly. Apply a wetting agent to ensure deep soaking of the root zone. Remove thatch and avoid adding excess amounts of nitrogen.
