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Before you begin, get an idea of how bad the problem is, and whether chinch bugs are the ones responsible. Cut the base off a coffee can and push it two inches (5 cm) into the turf. Pour in soapy water until it stays filled. Repeat in several areas of your lawn, especially at the border of yellow patches. Return after ten minutes and count chinch bugs floating on the surface: 5+ chinch bugs per can: a serious infestation. Continue to the next step for treatment. 24 chinch bugs per can: low-level infestation. Improve lawn health and test again later. Treat immediately if your lawn is in poor health. 01 chinch bug per can: no treatment necessary. If your lawn is in poor health, there is probably another cause. Alternatively, you might also take a close look at the lawn with a magnifying glass. This can be effective if you catch the chinch bug infestation early, before they've spread throughout your lawn: Rake the lawn vigorously for 2 ft (60 cm) on all sides of the damaged area, toward the center. Vacuum the damaged area and surroundings. Water thoroughly. Insecticidal soaps are considered safe and appropriate for organic farming. A homemade soap treatment is actually more likely to damage your garden, but pure castille soap or mild Ivory or Dawn products (not extra-strength, grease-cutting, or anti-bacterial) are usually safe in a solution of 2 tbsp dishwashing liquid per 1 gallon water (40 mL per 4 L). Mix in a clean sprayer, then shake or stir vigorously to combine. If using an insecticidal soap, dilute it following label instructions instead. This method also works best if you catch the infestation early and use it to target small areas of lawn. If you have hard water in your area, the soap may fail to mix in, leaving a scum on the surface after the water settles. If this happens, make a new mix using distilled or bottled water instead. Using a commercial insecticidal soap for chinch bugs is not legal in Canada, although this may just be an oversight. Homemade soap treatments are allowed. Any soap can cause damage to aquatic life. Do not apply it where the water could run off into a storm drain. Drench the damaged area of your lawn using a spray bottle or hose attachment. For best results, do this on a cool, still morning or evening. In windy or hot weather (especially above 90F / 32C), there is a much higher chance of damaging your plants. Try to avoid getting the soap in contact with nearby plants. Some trees and flowers are particularly vulnerable to soap damage, especially during times of drought. If you're concerned about potential damage, test a corner of your lawn first and check on it after 24 hours. The chinch bugs will run for cover and get caught in the nap of the flannel. Return after ten or fifteen minutes to vacuum the pests off the sheet, or drown them by putting the sheet in a bucket of water. Monitor your lawn to check for more chinch bugs or expanding damage. If necessary, repeat the soap treatment once a week, or once every three or four days for severe infestations. The soap breaks down quickly, so your lawn should be back to normal soon. You may want to check your soil pH after treatment is finished, since soap is alkaline. These predators are not available for purchase, but they often arrive during an infestation to feed on chinch bugs. Providing a variety of flowering plants encourages them by giving them places to hide and feed. These predators look very similar to chinch bugs. They tend to be smaller and faster, with larger eyes. If you're still seeing a lot of chinch bugs but your lawn seems healthy, you might be misidentifying this predator species. Ladybugs, lacewings, and parasitic wasps all feed on chinch bugs or their eggs. While they do not target chinch bugs as effectively as big-eyed bugs, they are all widely available for purchase. Beneficial nematodes (roundworms) may also help. These are proven to control grubs, though there aren't yet studies on their effectiveness for chinch bugs. You can buy beneficial nematodes at many home and garden stores. A neem oil product can control chinch bugs with little effect on plants and beneficial insects. Spray on the oil during cool, humid evenings, since it can break down or burn plants in direct sunlight. Some essential oils such as rosemary, lemongrass, cinnamon, or citrus oils can also help, but have not been studied as thoroughly. Dilute about 20 drops of oil in 1 gallon (3.8 L) of water, then spray onto your lawn. This can kill beneficial insects and earthworms and can take weeks or months to solve the problem, so use it only as a last resort. Wear safety goggles and a dust mask to avoid irritation, and try not to create too much dust. Wash your hands after applying. Use garden-grade or food-grade DE only. Swimming pool grade DE is a more significant respiratory hazard. Non-heated DE containing less than one percent crystalline silica is the safest option. Try applying DE with a bulb applicator. This will reduce the risk of getting the dust in your eyes, nose, and mouth. Apply DE to wet grass, as well, either after it rains or you've watered the lawn. This ensures that the small particles stick to the grass.
Check the chinch bug population. Vacuum the lawn. Buy or make a soap treatment. Spray the soapy water onto your lawn. Spread a flannel sheet over the soapy area. Repeat as needed. Encourage big-eyed bugs. Use other predatory insects. Try natural oil treatments. Sprinkle on diatomaceous earth.