Best Grub Killers & Grub Control Products

Best Grub Killers & Grub Control Products

For being such small insects, grubs and grub larvae cause devastating widespread damage to residential lawns. Without the proper control and preventive measures in your lawn care program, grub worms will damage and kill your grass to the point of needing full repair and renovation.

It’s important to know the difference between insecticides that will help prevent grub damage (proactively), and those that will kill grubs (reactive/curative products). The best grub killers and grub control products below show the active ingredients to look for.

Lastly, the application timing of these products are critical. Apply too soon and the efficacy may wear off in the summertime when the grubs are actively feeding. A delay in application can also be a recipe for disaster, as the grubs can already be active and the damage to your grass could already be done.

Be sure to get your grub control down on time this year. Use these products according to the label and you should be grub-free this season*.

Grub Control Products

1. Acelepryn G Insecticide

Acelepryn G Insecticide Grub Control
Acelepryn G Insecticide – Grub Control & Prevention

The best grub control and grub prevention is Acelepryn G Insecticide by Syngenta. It contains the active ingredient Chlorantraniliprole – an extremely effective chemical in preventing and controlling white grubs, Armyworms, and many more pests. This is also the main ingredient in Scott’s GrubEx. The Syngenta price tag is more is expensive is because it contains much more Chlorantraniliprole than Scott’s (0.3% vs. 0.08%) and is far superior to prevention.

You will also get > 10,000 sq. ft. coverage. So if you have a smaller lawn, split the bag with a friend or neighbor for peace of mind. I personally had grub damage last year in my new house and will take absolutely no chances this year – I’m going directly for Acelepryn this year. 

25 pound bag:

  • Application rates: 1.15 – 2.3 lbs. per 1,000 sq ft 
  • Coverage: 10,800 – 21,700 sq. ft.
  • Timing: Early May (spring)
  • Notes: Water in immediately after application or allow rainfall to move the product into the soil
  • Chemical class: Anthranilic Diamide

Now also available in 64 oz. and NEW 4 oz. liquids!

2. Meridian 0.33 G Insecticide

Meridian 0.33G Insecticide Grub Control
Meridian 0.33G Insecticide – Grub Control & Prevention

Another great options for grub control and grub prevention is Meridian 0.33 G Insecticide. This is also made from Syngenta, and contains the active ingredients Thiamethoxam. It’s an effective broad-spectrum insecticide that also targets Japanese beetles, June bugs, Sod webworms and more.

Meridian is a Group 4A Insecticide and provides great systemic control of white grubs throughout the growing season.

Apply up to 45 days before peak season when grubs are actively feeding on grassroots.

40 pound bag:

  • Application rates: 7-9 lbs. per 5,000 sq ft 
  • Coverage: 22,000 – 28,500 sq. ft.
  • Timing: Early May (spring)
  • Notes: Water in thoroughly after application
  • Chemical class: Neonicotinoid

3. Merit 0.5 G

Merit 0.5 G Insecticide Grub Control
Merit 0.5 G – Grub Control & Prevention

Finally, the next best grub control product option is Merit 0.5 G from Bayer. It contains an active ingredient called imidacloprid. A 30 lbs. bag will cover over 15,000 sq. ft. 

Two things to be mindful of with imidacloprid. First is insecticide resistance. This product should be applied in early to mid June as it does not have the same residual activity or efficacy as Thiamethoxam or Chlorantraniliprole. Second is that imidacloprid is a neonicotinoid and may be harmful to beed.

Nonetheless, Merit provides good systemic control of Cinch bugs, European Chafers, beetles and more in turfgrass and landscape ornamentals. I’ve used the liquid version with great success against termites, too.

30 pound bag:

  • Application rates: 1.4 – 1.8 lbs. per 1,000 sq ft 
  • Coverage: 16,000 – 21,400 sq. ft.
  • Timing: Mid June (late spring/early summer)
  • Notes: Water thoroughly within 24 hours of application. Avoid runoff
  • Chemical class: Neonicotinoid

Grub Killers

1. Dylox 6.2 Granular Insecticide

Dylox 6.2 Granular Insecticide Grub Killer
Dylox 6.2 Insecticide – Grub Killer & Preventer

Without a doubt, the #1 product to quickly kill grubs in your lawn is Dylox 6.2 Granular Insecticide by Bayer. It contains 6.2% Trichlorfon, which targets white grubs (and larvae), June bugs, Japanese beetles, Sod webworms, Armyworms, and more.

This instantly killed the grubs in my lawn. There’s also some peace of mind with this product as there are no Dylox restrictions regarding turf species or sites for landscape and recreational-area uses. This chemical also does not stick around very long. Once applied and watered in according to the label, Dylox kills grubs then degrades quickly.

30 pound bag:

  • Coverage: 10,000 sq. ft.
  • Timing: Summer, immediately when grubs are visible and causing damage
  • Notes: Water in immediately with 1/2″ of irrigation or rainfall
  • Class: Neonicotinoid plus Pyrethroid

2. Bayer 24 Hour Grub Killer Plus

Bayer Bioadvanced 24 Hour Grub Killer Insecticide

Last but not least is Bayer 24 Hour Grub Killer Plus. This product also has Trichlorfon and can be found at many big box stores and hardware stores. So if you can’t wait for the larger bags or professional named products to kill Armyworms and grubs, this readily available grub killer will do the job.

10 pound bag:

  • Coverage: 5,000 sq. ft.
  • Timing: Summer, immediately when grubs are visible and causing damage
  • Notes: Water thoroughly within 24 hours of application
  • Class: Neonicotinoid plus Pyrethroid

Other grub killers can include the chemical Carbaryl. This chemical is found in insecticides such as Sevin.

Grub Control on Amazon

White Grub Worm Life Cycle

The life cycle of grubs (often called grub worms) begin when the previous year’s grub worms emerge as June bugs (Japanese beetles) in the spring – between May and June. These beetles won’t harm turfgrass but they will feed on and damage trees and ornamentals.

June bugs and adult beetles will then soon lay their eggs in healthy lawns. Those eggs hatch into white grub larvae in the summer, and it’s those grubs that will damage your lawn throughout the summer and fall months. July through September are when rubs feeding

As the winter rolls around and the soil begins to freeze, the surviving grub worms will bury themselves deeper into the soil before and sleep in a vegetative state overwinter. Once the spring rolls around the following year, grubs will emerge from the soil and become beetles in May/June. And thus the continuous life cycle of the June bug beetles and white grubs.

As they feed on the grass roots throughout the summer and autumn months, you will find irregular patterns of dead brown patches throughout your lawn. You will be able to peel the grass back like a carpet or doormat, and the grubs are usually found along the edges of the damaged turf.

White Grubs FAQs

When should I apply grub control products?

In the spring. Depending on which product you choose will dictate exactly when you need to apply. Grub insecticides containing Chlorantraniliprole or Thiamethoxam should be applied in early May, while imidacloprid (Merit) should be applied in mid-June as it has less residual activity and efficacy as the other two chemicals.

How can I kill grub worms in my lawn?

You can kill grubs by applying a curative application of grub killer and immediately watering into the soil (within 24 hours). As the insecticide moves down into the soil, the roots will begin to uptake the chemicals. The grubs will ingest the fatal chemicals as they continue to eat the grass roots.

When do you put down grub killer?

Apply a grub killer at the first signs of grub worms and grub damage. Water in thoroughly and immediately after application.

What is Merit grub control?

Merit is a product made by Bayer. It contains the active ingredient imidacloprid which provides systemic control of many insects including white grub larvae.

Sources: https://ag.umass.edu/turf/fact-sheets/current-insecticide-approaches-for-white-grub-control

*Disclaimer: This post contains effective products against grubs when applied as directed. Always read the label and follow the labeled instructions as set out by the manufacturer – including personal protective equipment (PPE) and restrictions such as near schools and waterways.

2 “Best Grub Killers & Grub Control Products” Reviews

  1. This is awesome and came at the perfect time. Just grabbed a bag of Acelepryn for me an my neighbor to split because we both had a lot of grub damage last year.

    1. Hi Jason – thanks for the comment! Good choice with Acelepryn. Get it watered in before Memorial Day and you should be all set for 2021 grubs. Good luck!

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