Queensland Lawn Pest Control: How to Treat Armyworm, Lawn Grubs, and B

Your Complete Queensland Guide to Identifying, Treating, and Preventing Lawn Pests

Oh, how sorry we are that you're here today.
Your pride and joy has come under attack, whether it's Armyworm, Black Beetle, or another pest overtaking your green, green grass.

It may not be fair, but it is treatable.

We're here to share trusted lawn care products suited to Queensland conditions, along with the know-how to use them, so you get this situation under control ASAP.

The good news is that if you need personalised advice, our team is only a call, a visit to GoTurf Brendale, or an email away.

Now, in Australia, the term “lawn grub” is often used to cover more than one type of pest. It can include beetle larvae, like curl grubs, and caterpillars, like armyworms. Understanding which pest is in your lawn is the first piece of the puzzle.

So without further ado, here’s all of our best advice on treating lawn pests, plus the products you need for treatment and prevention, so you never find yourself here again (hopefully).

Armyworm: Identification and Treatment

How Do I Know If I Have Armyworm?

Armyworms can bring a healthy lawn to its knees in a matter of days if left untreated. Here’s what to look for:

Physical characteristics

2 mm to 40 mm in length (mature caterpillars are 30–40 mm)
Three prominent white or cream stripes running down their back and sides
Smooth to the touch with no obvious hairs
Curl up when disturbed
Four abdominal prolegs

Detection methods: The best time to go looking for armyworms is during the evening when they’re most active.

Torch method: Kneel at the edge of damaged areas at dusk. Spread the grass open with your hand and slowly run a torch across the lawn profile, looking for caterpillars feeding or moving.

Soapy water test: Mix a small amount of dishwashing detergent with water in a bucket. Pour it over a small area at the edge of a struggling or scalped lawn. Watch for 10 minutes — if they’re there, armyworm caterpillars will rise to the surface to breathe.

How to Treat Armyworm

Time is of the essence! Armyworms can wreak havoc quickly.

Treatment steps:

Mow your lawn
Apply a fast-acting liquid insecticide to the leaves in the afternoon.
When armyworms become active in the evening, they'll feed on the treated leaf.
Repeat applications over the upcoming weeks to ensure complete eradication.

Black Beetle: Identification and Treatment

Adult African black beetles are common in Queensland lawns and are a natural part of the ecosystem. They rarely cause significant harm.

The real problem occurs during the root-feeding larval stage, which is commonly called lawn grubs.

Lawn Grubs: Identification and Treatment

Watch for these warning signs:

Increased bird activity: Grubs make a tasty snack
Greyish-brown moths at dusk: Flying above the grass to lay eggs
Brown patches that won’t recover: Lift the grass; if it rolls up like carpet, the roots may be gone
Spongy lawn underfoot: Often indicates larvae below the surface

How to Treat Lawn Grubs

Because grubs feed and reproduce quickly, you must act with haste.

Treatment timeline:

Apply treatment as late in the day while adults are active
Reapply in two weeks to catch the next generation as eggs hatch

Year-Round Lawn Pest Prevention Tips in Queensland

While fast treatment is important, prevention is always easier than lawn repair. Reduce the chances of future infestations by:

Maintaining a healthy lawn with a strong fertilising schedule [read our fertiliser guide]
Mowing regularly and avoiding scalping (this can weaken grass and attract pests)
Watering deeply but infrequently to encourage strong root systems
Applying preventative grub treatments for long-term protection

A strong, well-maintained lawn is naturally more resistant to armyworm, grubs, and beetle larvae.

Get the Products You Need at GoTurf

Don’t let pests have a field day on your pristine lawn. You can shop our lawn pest control products online, give us a call, or visit us in-store for tailored advice.

Available in-store and online at GoTurf:

Don’t forget, our team is always here to help. If you need personalised advice, we’re only a call or visit away.

Queensland Lawn Pest Control: How to Treat Armyworm, Lawn Grubs, and Black Beetle

Your Complete Queensland Guide to Identifying, Treating, and Preventing Lawn Pests