Each pest feeds a little differently, but the warning signs tend to look similar at first: patches of grass that turn brown and don't respond to extra water. Catching the pattern early makes treatment far more effective.
Signs to watch for
- Irregular brown or yellow patches that spread outward, especially in hot, sunny areas
- Grass that pulls up easily or feels spongy underfoot
- Small notches or ragged edges chewed into blades, most visible early in the morning
- Visible insect activity when you part the grass at the edge of a damaged patch
What causes it
- Chinch bugs thrive in hot, dry St. Augustine lawns, especially near driveways that hold heat
- Mole crickets tunnel through the sandy soil common throughout the coastal plain
- Sod webworms and armyworms feed at night and can strip a lawn quickly once numbers build
- Drought-stressed turf is far more attractive to feeding insects than healthy, well-watered grass
What you can do
- Water deeply and consistently so turf stays healthy and less appealing to pests
- Keep grass at the correct mowing height for your grass type, since scalped lawns stress faster
- Look closely at damaged areas before treating, since different insects call for different approaches
- Clear out thatch buildup that gives insects a place to hide close to the soil

