Northeast Florida summers are hard on grass. The heat is relentless, the humidity never lets up, and by July most lawns are already working overtime just to stay green. What a lot of homeowners don’t realize is that some of what looks like heat stress or drought damage is actually something else entirely: insects feeding on your turf from the ground up.
Two pests in particular do the most damage during summer in Northeast Florida: chinch bugs and mole crickets. Here’s what they look like, why they are hard to catch early, and what to do when you find them.
Chinch Bugs: Small Pest, Big Damage
Chinch bugs are tiny, but they work fast. They feed by piercing grass blades and pulling out the moisture, then injecting a toxin that prevents the plant from taking up water on its own. The result looks a lot like drought stress: yellowing patches that turn brown and expand outward. If you’re watering regularly and still seeing those patches spread, chinch bugs are worth investigating.
St. Augustine grass is their preferred target, which makes them a particularly common problem in Northeast Florida where St. Augustine is one of the most widely planted turf varieties. They thrive in hot, dry conditions and tend to concentrate in sunny areas first, especially along sidewalks, driveways, and the edges of the lawn where heat reflects off hard surfaces.
By the time the damage is visible, a chinch bug population can already be well established. That’s part of what makes them difficult to manage with DIY approaches. Store-bought products may knock back the surface population without addressing the full infestation, and chinch bugs have shown increasing resistance to some common pesticide classes in Florida.
Rotating treatments and knowing which products are effective is something a trained technician handles differently than a homeowner working from a shelf at the hardware store.
Mole Crickets: The Underground Problem
Mole crickets are a different kind of threat. They tunnel through the soil just below the surface, severing grass roots and disrupting the root zone in a way that causes turf to die from underneath. The surface damage shows up as spongy, uneven ground and browning turf that pulls away easily because the roots holding it in place are gone.
They’re most active at night and after rain, which means homeowners often don’t connect the damage to an insect at all. A lawn that looked fine on Monday can show significant dieback by the weekend, and without knowing what to look for, it’s easy to blame the weather.
Mole crickets are harder to treat once they’re fully mature, which is why timing matters. Late summer applications targeting younger nymphs are more effective than trying to control adult populations that have already done their damage. A pest professional can identify which life stage you’re dealing with and time treatment accordingly.
How to Tell If You Have a Lawn Pest Problem
Not every brown patch is a pest problem, but there are a few ways to tell the difference. A simple drench test can help identify chinch bug activity: mix a small amount of dish soap with water and pour it over a square foot of turf at the edge of a damaged area. If chinch bugs are present, they’ll surface within a few minutes.
For mole crickets, look for irregular tunneling near the soil surface, spongy ground that gives underfoot, or turf that lifts away from the soil with minimal resistance. You can also try the same soap drench test, and mole crickets will surface if they’re active in that area.
If you’re seeing either of these signs, it’s worth getting a professional assessment before the damage spreads further.
Let Us Help Protect Your Lawn This Summer
Our lawn pest control service is available to Jacksonville-area homeowners and is built around the specific conditions Northeast Florida creates each summer. If you’re seeing unexplained browning, patchy turf, or damage that isn’t responding to watering, we can assess your lawn and put together a treatment plan that addresses what’s actually there.
Summer is not the time to wait and see. The longer chinch bugs and mole crickets go untreated, the more turf you lose, and some of that damage can be difficult to reverse before fall.
