Tackling Army Grubs and Black Beetles in Your Mid North Coast Lawn
If you live in the Mid North Coast of NSW, chances are you've encountered the nuisance of army grubs or black beetles in your lawn. These pests can wreak havoc on your garden, leaving brown patches and thinning grass in their wake. But don't worry — with the right knowledge and action, you can tackle these pests and protect your lawn.
In this blog, we’ll explain what army grubs and black beetles are, how they damage your lawn, and the best ways to manage and treat them. Plus, we’ll share a handy detection method and where you can get the right products and expert advice locally.
What Are Army Grubs and Black Beetles?
Army Grubs (also known as tropical grass webworms) are the larvae of the armyworm moth. The larvae can be identified as small, C-shaped grubs that are pale to greyish in colour, often with dark markings. Army grubs are notorious for their voracious appetite, and they feed on the roots of grass plants, causing significant damage to lawns. Their feeding creates holes, with grass wilting and turning brown, sometimes making it look like patches of the lawn have been scorched.
Black Beetles are the adult form of the army grub. The beetles themselves are typically black and shiny and are attracted to light at night. While they don’t do as much damage to the lawn as the grubs, their presence signals the possibility of a grub infestation.
How They Damage Lawns
Both army grubs and black beetles can cause extensive damage to your lawn, particularly if left unchecked. The grubs feed on grass roots, disrupting the plant's ability to absorb water and nutrients. This results in thinning grass, brown patches, and even large areas of bare ground. The damage is often most noticeable in the warmer months, as the grubs are most active from spring to autumn.
You may also spot the cacoons on your eaves, remove them as soon as you see them, their eggs will soon hatch into larvae, leading to the next wave of damage.
Finding and Detecting Army Grubs and Black Beetles
One of the most effective ways to detect army grubs is by using a simple method: warm soapy water.
Here’s how it works:
- Mix about 1 tablespoon of dishwashing liquid into 4 litres of warm water.
- Pour the soapy water over a patch of your lawn where you suspect grubs are active.
- Wait for about 10-15 minutes. The soap will irritate the grubs, causing them to surface.
- If grubs are present, you’ll see them wriggling to the surface. If they are in large numbers, it’s a good sign you have an infestation.
This method is quick and effective, allowing you to assess the extent of the damage and take action before it gets worse.
How to Treat Army Grubs and Black Beetles
Once you’ve confirmed the presence of army grubs or black beetles, it’s time to take action. The key is to address both the larvae (grubs) and adult beetles. Here’s what you can do:
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Apply a targeted pesticide: There are several products on the market designed specifically to target army grubs and black beetles. Look for products containing chlorantraniliprole or imidacloprid, which are effective against both grubs and beetles. Always follow the manufacturer’s instructions for the best results.
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Control the adults: While the beetles themselves aren’t as damaging, controlling their numbers is important to prevent them from laying eggs. If you notice beetles gathering on your eaves, it’s a good idea to physically remove them, either by sweeping them off or using a vacuum. Just be careful — hosing them down can send them straight into your lawn, leading to another round of grubs.
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Aerate and fertilise: Once the pests are under control, it’s important to give your lawn some TLC. Aerating your lawn and applying a balanced fertiliser will help it recover from the damage and promote healthy growth.
Get the Right Products and Advice from Lumpy's
When it comes to tackling army grubs and black beetles, having the right products and expert advice is crucial. That’s where Lumpy's in the Mid North Coast comes in. Whether you need a specific insecticide, a natural solution, or just some helpful tips, Lumpy's is your go-to place for lawn care advice and products. Their knowledgeable staff can guide you to the best treatments for your lawn’s unique needs and ensure you have everything you need to effectively combat these pests.
Final Thoughts
Army grubs and black beetles might be a challenge for your lawn, but with the right approach, you can keep them under control. By using warm soapy water to detect grubs, applying the right treatment, and seeking expert advice from Lumpy’s, you can restore the health and beauty of your lawn.
Remember, prevention is key — regular monitoring and prompt action will help keep your lawn lush and green, free from these pesky pests. Happy gardening!
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