Cinch bugs can fairly quickly infest a lawn, creating large brown and yellow spots. Often these affected areas are at first thought to suffer from a lack of water. When additional watering does not seem to help, an infestation of these small creatures can well be the cause of the problem.What Cinch Bugs Like – Lack of adequate water and cinch bugs actually go hand in hand. These bugs tend to attack grass that is stressed due to a lack of water, kill the grass, and eventually spread to more healthy grass. The bugs prefer hot sunny parts of the lawn, and tend not to be particularly bothersome in shaded areas. Infestations are more prevalent in lawns containing St. Augustine grass, as this species of grass appears to be the bug’s favorite. Cinch bugs do infest Kentucky bluegrass and other turf grasses on occasion, but are mostly partial to St. Augustine.