How to Get Rid of Black Beetles

For many New Zealand gardeners, black beetles are a common yet frustrating pest. These small, dark insects can wreak havoc on your garden, damaging plants, lawns, and even the soil. Whether you’re tending to a lush backyard or a commercial garden, black beetles can quickly become a major problem if left unchecked.

In this Jim’s Mowing NZ blog, we’ll explore what black beetles are, what attracts them to your garden, and most importantly, how to get rid of them.

What are Black Beetles?

Black beetles are a broad category of beetles characterised by their dark, often shiny exoskeletons. They belong to the order Coleoptera, which is one of the largest groups of insects in the world. While there are many species of black beetles, a few are particularly common in New Zealand gardens:

1. African Black Beetle (Heteronychus arator)

This invasive species is one of the most damaging black beetles in New Zealand. It feeds on the roots of grasses and other plants, causing significant damage to lawns and crops.

1. Black Carpet Beetle (Attagenus unicolor)

While primarily known for infesting homes and damaging fabrics, these beetles can also be found in gardens, where they feed on plant debris and organic matter.

1. Ground Beetles (Family Carabidae)

Not all black beetles are harmful. Some ground beetles are actually beneficial, as they prey on other garden pests like slugs and caterpillars. However, certain species can still cause damage to plants.

1. Click Beetles (Family Elateridae)

These beetles are named for the clicking sound they make when flipping themselves upright. While not all click beetles are harmful, some larvae (known as wireworms) can damage plant roots.

Understanding the specific type of black beetle you’re dealing with is key to implementing the right control measures.

What Attracts Beetles to Your Gardens

Black beetles are attracted to gardens for several reasons. By understanding what draws them in, you can take steps to make your garden less inviting to these pests. Here are some common factors:

1. Moist Soil – Many black beetles, such as the African black beetle, thrive in moist environments. Overwatering your lawn or garden can create the perfect conditions for these pests to breed and feed.
2. Organic Matter – Decaying plant material, compost piles, and mulch can attract black beetles, especially species like the black carpet beetle. These materials provide both food and shelter.
3. Lawn Grasses – African black beetles are particularly drawn to lawns, where they feed on the roots of grasses. If your lawn is lush and well-maintained, it may be more susceptible to infestations.
4. Weeds and Overgrown Plants – Overgrown gardens and weeds can provide hiding spots for black beetles, making it easier for them to avoid predators and thrive.
5. Warm Weather – Black beetles are more active during warmer months, which is why infestations often peak in spring and summer.

How to Get Rid of Black Beetles

If you’ve discovered black beetles in your garden, don’t panic. There are several effective methods for controlling and eliminating these pests. Here’s a step-by-step guide to help you get started:

Step 1: Identify the Beetle

Before taking any action, it’s important to identify the type of black beetle you’re dealing with. This will help you choose the most effective treatment method. Look for distinguishing features, such as size, shape, and behaviour, or consult a gardening expert for assistance.

Step 2: Remove Attractants

• Reduce Moisture – Avoid overwatering your lawn and garden. Ensure proper drainage to prevent water from pooling.
• Clear Debris – Remove decaying plant material, compost piles, and mulch from areas where beetles are active.
• Mow Regularly – Keep your lawn well-maintained and avoid letting grass grow too long.

Step 3: Use Natural Remedies

• Beneficial Nematodes – These microscopic worms can be applied to the soil to target beetle larvae. They are a natural and environmentally friendly solution.
• Diatomaceous Earth – Sprinkle this powder around affected areas. It works by dehydrating and killing beetles on contact.
• Neem Oil – A natural pesticide, neem oil can be sprayed on plants to deter beetles and disrupt their life cycle.

Step 4: Apply Chemical Treatments

• Insecticides – If natural methods aren’t enough, consider using a targeted insecticide. Look for products specifically designed to control black beetles, and follow the instructions carefully to avoid harming beneficial insects.
• Soil Treatments – For severe infestations, soil treatments can be applied to kill beetle larvae in the ground.

Step 5: Monitor and Prevent

• Regular Inspections – Keep an eye on your garden for signs of beetle activity, such as damaged plants or visible beetles.
• Barrier Methods – Use physical barriers, like row covers, to protect vulnerable plants from beetles.

Step 6: Call in the Professionals

If you’re dealing with a persistent or large-scale infestation, it may be time to call in the experts. At Jim’s Mowing NZ, we offer professional gardening services, including pest control, to help you tackle black beetles and other garden pests. Our team can assess your situation, recommend the best treatment plan, and restore your garden to its healthy, vibrant state.

In Summary

Black beetles can be a serious problem for New Zealand gardeners, but with the right knowledge and tools, you can effectively manage and eliminate these pests. Start by identifying the type of beetle you’re dealing with, then take steps to remove attractants and implement natural or chemical treatments as needed. Regular monitoring and prevention are key to keeping your garden beetle-free.

 

If you’re struggling to control black beetles on your own, don’t hesitate to reach out to us at Jim’s Mowing NZ. Our professional gardening services are here to help you protect your garden and keep it looking its best. Call us today on 0800 454 654 to schedule a consultation and take the first step towards a healthier, beetle-free garden.