Pest Guides

Does Grubex Kill Chinch Bugs?

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Yes, Grubex can kill chinch bugs. Although Grubex is primarily designed to control grubs, it can also be effective against chinch bugs when applied correctly. However, its effectiveness may vary, and for best results, consider using a product specifically designed for chinch bug control.

Does Grubex Kill Chinch Bugs? An In-Depth Analysis


Chinch bugs are small insects that can cause significant damage to lawns and cereal grasses. They feed on the stems of turf grass, sucking the blades dry and injecting them with toxins. This article delves into the effectiveness of Grubex, a popular insecticide product, in controlling these pesky insects.

What is Grubex?

Grubex is a granular insecticide product developed by Scotts that primarily targets grubs and other lawn-damaging insects. It works by using an active ingredient called chlorantraniliprole, which disrupts the insects’ growth and molting processes. The product is typically applied to a dry lawn in the spring or early summer to target grubs as they develop.

Does Grubex Kill Chinch Bugs?

Grubex, while primarily designed for grubs, can also be effective against chinch bugs. According to MSU Extension, one application of insecticides like imidacloprid or clothianidin can treat both chinch bugs and grubs. Scotts GrubEx Grub Killer, which contains chlorantraniliprole, is also mentioned as a product that can be used for chinch bug treatment.

However, GrubEx is primarily a preventative grub control product, and its effectiveness against chinch bugs may vary. For the best results, consider using a product specifically designed for chinch bug control.

How to Apply Grubex for Chinch Bug Control

  1. Apply GrubEx during the appropriate time: The ideal time to apply GrubEx for chinch bug control is when the insects are most active, which is typically during the summer months.
  2. Spread the granules evenly: Distribute GrubEx granules evenly across your lawn, following the label instructions for the correct application rate.
  3. Water the lawn: After applying GrubEx, water your lawn to a depth of 1/2 inch. This helps the granules penetrate the soil and become activated.
  4. Monitor and reapply if necessary: Keep an eye on your lawn for any signs of chinch bug activity. If the infestation persists, you may need to reapply GrubEx or consider using an alternative insecticide specifically designed for chinch bug control.

Potential Risks and Drawbacks

While Grubex can be effective, it is essential to be aware of potential risks and drawbacks. These include eye and respiratory irritation, toxicity to aquatic life, non-target effects, and the need for proper application and timing.

Alternatives for Chinch Bug Control

Besides Grubex, several alternatives can help control chinch bugs. These include using diatomaceous earth or neem oil, introducing beneficial nematodes to your lawn, practicing good lawn maintenance, encouraging natural predators, and regularly monitoring your lawn.

Maintaining Your Lawn to Prevent Chinch Bugs

A healthy lawn is a great deterrent for chinch bugs. Practices such as regular watering, mowing, and fertilizing can help reduce the occurrence of these pests.

Is Grubex Safe for Pets and Children?

Grubex is considered safe for pets and children when used according to the manufacturer’s instructions. After applying Grubex, it is important to water the lawn, and once the grass dries, it should be safe for people and pets.


While Grubex is primarily designed to control grubs, it can also be effective against chinch bugs when applied correctly. However, it’s essential to consider the potential risks and drawbacks, and to perhaps consider alternative methods of chinch bug control. By maintaining a healthy lawn and using preventative measures, you can keep your yard chinch bug-free.

Frequently Asked Questions

How long does it take for Grubex to work?

Grubex typically begins to work within 24 hours of application. However, it may take up to 7 days to see noticeable results.

Can I use Grubex on other types of grass or plants?

Yes, Grubex can be used on a variety of grass types, including Bermuda grass, Kentucky bluegrass, and fescue. It’s safe for ornamental plants and flowers as well.

How often should I apply Grubex for chinch bug control?

As a general guideline, Grubex should be applied once a year, typically in late spring or early summer. However, if chinch bug activity continues, a second application may be necessary.

Can Grubex be used in combination with other insecticides?

Yes, Grubex can be used in combination with other insecticides. However, it’s important to follow the manufacturer’s instructions for each product to avoid over-application or potential harm to your lawn.

Is Grubex harmful to beneficial insects?

Grubex is designed to target lawn-damaging pests like grubs and chinch bugs. However, it may also affect beneficial insects such as earthworms and bees. It’s important to apply the product carefully to minimize non-target effects.

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