Grubs may be small, but their impact on Southeast Michigan lawns is anything but minor. These underground pests feed on grass roots, weakening turf and inviting further damage from wildlife. Lush Lawn provides expert insight and treatment solutions designed to protect and restore your lawn’s health.
Grubs are the immature larvae of beetles, particularly the Japanese beetle, the European chafer, and the masked chafer. These larvae live beneath the soil’s surface, feeding on plant roots, which makes them a threat to lawns and garden beds. Grubs are typically white or creamy, with a characteristic "C" shape. They can range in size from a small, newly hatched larva to a large, mature grub that’s several inches long.
In Michigan, the most common grub species are the Japanese beetle and the European chafer, both of which are highly destructive to turf. Grubs generally become active in late summer and early fall, feeding heavily during these months, before pupating into adult beetles that will eventually emerge the following summer to start the cycle again.
The primary concern for Michigan homeowners is the damage grubs can do to lawns. As grubs feed on grass roots, they disrupt the plant’s ability to absorb water and nutrients, which can cause large patches of dead or dying grass. Lawns affected by grubs are often easily pulled up, as the roots are no longer anchoring the turf to the soil.
Grub-damaged areas may also attract other pests, such as raccoons, skunks, and birds, which dig up the lawn in search of the grubs. This can further exacerbate the damage, creating a patchy and unsightly lawn.
Grubs can also affect trees and shrubs, particularly when the root systems of these plants are young or shallow. Grubs feeding on tree roots can stunt growth, weaken the plant, and make it more susceptible to diseases and pests. In some severe cases, grub infestations may cause young trees to die if the damage is extensive enough.
Gardens and flower beds can also suffer from grub infestations. Plants with weakened root systems may not be able to absorb the nutrients they need, leading to yellowing leaves, poor flower production, and stunted growth. Over time, continued grub feeding can render entire garden beds unproductive.
Before taking action, it’s important to determine if grubs are present in your lawn or garden. Here are some key signs to look out for:
The best time to target grubs for control in Michigan is to lay down grub preventer between late May and mid July to stop the grub life cycle. Grubs hatch from eggs laid by adult beetles during this period. Preventer treatment kills grubs shortly after they hatch.
Chemical insecticides are one of the most common and effective methods for controlling grubs. Products containing imidacloprid, chlorantraniliprole, or carbaryl are frequently used to target grubs in Michigan. These insecticides can be applied to your lawn in either liquid or granular form and are absorbed by the grass, killing the grubs as they feed.
While chemical control can be very effective, it should be used carefully and sparingly. Overuse of chemical insecticides can harm beneficial insects, such as pollinators, and disrupt local ecosystems. Always follow manufacturer instructions to minimize environmental impact. For best results and proper application, consider hiring a professional grub control service to handle treatment safely and effectively.
If you prefer a more eco-friendly approach, beneficial nematodes are an excellent option for controlling grubs. These microscopic worms naturally parasitize and kill grub larvae by entering their bodies and releasing bacteria that cause the grubs to die. Nematodes are safe for humans, pets, and beneficial insects and can be applied in the late summer or early fall when grubs are feeding.
Beneficial nematodes are available in many garden centers and online, and they need to be applied when the soil is moist. It’s important to follow the recommended application rates and conditions for best results.
Cultural practices can help reduce the conditions that make your lawn more attractive to grubs. These include:
Diatomaceous earth is a naturally occurring substance composed of fossilized microscopic aquatic organisms. It works by causing the exoskeletons of grubs to dry out and die. While it’s a safe option for controlling grubs, diatomaceous earth needs to be applied carefully and may require reapplication after rainfall. Grub worms rise to the surface when it rains a lot.
Grub infestations can severely damage your lawn if not addressed promptly. By understanding the grub life cycle, recognizing signs of infestation, and implementing timely preventive and curative measures, you can maintain a healthy, green lawn.
For expert assistance, contact Lush Lawn today to get a FREE quote on Grub Preventer Treatment to protect your lawn from grub damage.
What are the signs of a grub infestation?
Signs include brown patches, spongy turf, and increased activity from animals like raccoons and skunks digging in the lawn.
When is the best time to apply grub control products?
Late spring to early summer is optimal for preventive treatments, targeting grubs before they hatch and begin feeding.
Can I apply grub control products myself?
Yes, but proper identification of grub species and timing are crucial. Professional services ensure accurate application and effective results.
How can I prevent future grub infestations?
Maintain healthy turf through regular care, apply preventive treatments annually, and monitor for signs of beetle activity.
Are there natural methods for grub control?
Yes, options like beneficial nematodes and milky spore disease can help control grubs naturally, though they may take longer to be effective.