How to Spot and Treat Chinch Bug Damage on Your Lawn

Noticed some dry, yellow patches creeping across your lawn each summer? You might be dealing with one of the most common lawn insects in Ontario: the notorious chinch bug. These tiny pests pack a serious punch, especially when the weather turns hot and dry. But the good news? You can stop the damage in its tracks with early detection and a solid prevention plan.

When Do They Appear?

As spring heats up, these pests start stirring. They often hide out in garden beds, under shrubs, or beneath bushes—basically anywhere warm and cozy. Once the peak summer heat arrives (we’re looking at you, July and August), they move into open turf to start feeding. And that’s when the trouble begins.

What to Look For

In their early stages, these bugs are small and red—not super destructive, but still something to watch. As they mature, they turn black with a telltale white “X” on their backs. This is your visual clue that it’s time to act.

Signs of Chinch Bug Damage

The trouble usually starts near garden edges or flower beds, then works its way into the center of the lawn. Affected spots tend to look lower than the healthy grass and feel brittle or dried out. If you notice a strange yellow patch stretching from a bed or bush, it’s time to investigate. These lawn insects don’t mess around—they can spread quickly and cause extensive damage if left unchecked.

How to Check for an Infestation

There are a couple of simple ways to confirm your suspicions:

1. Manual Inspection

Pull the grass apart near the discoloured area and take a close look at the soil line. You’ll often see small insects darting around. Be sure to check a few different areas for a better sense of the problem.

2. The Tuna Can Trick

Cut the top and bottom off a tuna can, press it a couple of centimeters into the soil, and fill it with water. Wait a few minutes. If small black bugs with white markings float to the top—bingo, you’ve found your culprit.

Prevention Is Key

These bugs thrive in hot, dry conditions. Luckily, they don’t do well in moist environments. So your best defense? Watering. Give your lawn a deep soak at least twice a week, for about an hour per spot. Not only does this keep your grass strong and healthy, but it also creates an environment where most common lawn insects struggle to survive.

If your lawn is already showing signs of stress, or if you’re not sure what’s causing the damage, it’s worth bringing in a chinch bug service. A professional can confirm the issue and provide targeted treatments to knock out the infestation before it gets worse.


At the end of the day, your lawn is only as strong as your ability to spot trouble early. Whether it’s chinch bugs or other common lawn insects, staying informed—and well-watered—can make all the difference.

Need help diagnosing a lawn pest problem? Our expert chinch bug service is here to help Ontario homeowners protect their turf with proven solutions and decades of local experience.

Additional conditions may apply. Starting price is based on up to 4,000 Sq.Ft. Property size. Cannot be combined with any other offer.
*Free Overseeding is only valid with the purchase and completion of a full program. Must sign up for Prepay or Easy-Pay option. Taxes not included.

Terms & Conditions  |  Copyright © Dr. Green 2025