What pest is commonly associated with southern lawns, characterized by brown patches?

The pest commonly associated with southern lawns that is characterized by brown patches is known as dollar spot disease. This fungal disease thrives in warm, humid conditions typical of southern climates, particularly when lawns are stressed due to drought, poor nutrition, or excessive shade. Dollar spot manifests as small, circular patches of brown grass, which can expand and coalesce into larger spots if left untreated.

Understanding that dollar spot is caused by a specific fungus helps to focus on management practices like proper fertilization, watering, and maintaining healthy turf. Monitoring environmental conditions is also crucial because the disease can be more prevalent during certain weather patterns. Cultural controls, such as spacing the mowing height and avoiding late afternoon watering, can help in managing the disease effectively.

In contrast, the other options—leafhoppers, grubs, and chinch bugs—do not typically cause the distinct brown patches that signify dollar spot disease. Leafhoppers are more often pests that affect leaf integrity and can transmit diseases but don’t create the same visual symptoms as dollar spot. Grubs damage the root systems of grass, leading to overall decline rather than specific patchy discoloration. Chinch bugs can also cause brown patches in lawns, but their symptoms often differ in appearance and are related to insect feeding