Diatomaceous Earth for June Bugs

June bugs, often an unwelcome summer visitor, can wreak havoc on gardens and lawns. Using natural, chemical-free solutions such as diatomaceous earth can help control these pests without harming the environment. This article explains what diatomaceous earth (DE) is, explores the biology and habits of June bugs, and provides practical advice on how to use this natural remedy effectively.

What is Diatomaceous Earth?

Diatomaceous earth (DE) is a naturally occurring, eco friendly, sedimentary rock composed of fossilized remains of diatoms, microscopic algae with silica-based shells. It appears as a fine white powder and is highly absorbent. Due to its abrasive qualities, DE is commonly used as a natural insecticide for pest control including to get rid of june bugs. It works by damaging the exoskeleton of insects, causing dehydration and eventual death (National Pesticide Information Center, 2021).

Understanding June Bugs

June bugs, scientifically known as Phyllophaga spp., are a type of beetle that emerges in late spring and early summer, hence their name. These insects are nocturnal and are typically brown or black with shiny, hard shells. Adult June bugs are drawn to light, warmth, and nutrient-rich foliage, while their larvae, commonly called grubs, feed underground on plant roots (University of Minnesota Extension, 2020). Female June bugs commonly lay eggs in May and June. A female June bug lays between 50 and 200 eggs at a time.

What Attracts June Bugs?

June bugs are primarily attracted to:

June beetles are attracted to light. Bright lights like your backyard or front porch light, especially at night. They can swarm to these locations in large numbers.
Moist and healthy lawns, particularly those well-fertilized or rich in organic matter.
Leafy plants, fruits, vegetables, and flowers in gardens.

Bugs and Predators Attracted to June Bugs

The presence of June bugs can attract additional pests and predators, including:

Birds such as crows, robins, and grackles that feed on adult beetles and larvae.
Skunks, raccoons, and moles digging in lawns seeking larvae.
Parasitic wasps and flies, natural predators that help control beetle populations (Clemson Cooperative Extension, 2019).

Damage Caused by June Bugs

June bugs and their larvae can cause significant harm:

Adult beetles feed on leaves, fruits, and flowers, leading to cosmetic and structural plant damage.
Larvae (grubs) are even more destructive, feeding on grass roots, leading to dead patches and weakened lawns susceptible to disease.
The indirect damage caused by predators seeking grubs can exacerbate lawn damage (Penn State Extension, 2018).

How to Apply Diatomaceous Earth to Control June Bugs

Effectively using diatomaceous earth involves several key steps:

Use an Approved DE: Ensure you choose diatomaceous earth that is rated for crawling insects, which is safe for pets and humans. Pool or filter grade diatomaceous earth is toxic for humans and animals.
Identify Problem Areas: Target application to areas showing signs of infestation, particularly around plants and lawns showing damage.
Apply Dry DE: Sprinkle the powder lightly around plants, garden beds, and directly onto the lawn, focusing especially near the bases of plants.
Apply Wet DE: Mix 1/4 cup of the product per 1 gallon of water and put into garden sprayer. Apply until it is just running off plants. Once it drys, it will form a layer of diatomaceous earth on plants and other locations you apply to.
Reapply After Rain: Since DE loses effectiveness when wet, reapplication after rain or heavy dew is necessary.
Use Protective Gear: Although safe, DE can irritate lungs and eyes, so wear a mask and gloves during application (Penn State University Extension, 2017).

Alternative Chemical-Free Solutions

Aside from DE, other effective natural methods to repel or control June bugs include:

Beneficial nematodes: Microscopic organisms that attack and eliminate June bug larvae underground. You can source beneficial nematodes from our friends at Arbico Organics!
Traps: Setting up light traps at night to attract and capture adult beetles. Garrety Home Pros says, "You can trap adult June bugs naturally by mixing half a cup of molasses and half a cup of water in a container with a funnel neck. The sweet scent lures them inside, where they will eventually drown in the concoction".
Manual Removal: Regularly inspecting plants and manually removing beetles can reduce populations. Put some gloves on and pick them off plants and put them in a soapy water mix in a jar to seal their fate.
Biological Control: Encouraging birds and beneficial insects to naturally manage beetle populations. Set out bird feeders to encourage a larger bird population in your front or backyard. Birds are nature's best insect control.
Milky Spore: Spray Milky Spore onto your lawn to help kill and control june bug grubs

Conclusion

Diatomaceous earth provides a highly effective, environmentally friendly solution for managing June bug infestations. Combining DE with other chemical-free methods ensures your garden and lawn remain healthy and vibrant throughout the summer months. By understanding June bugs and proactively managing their populations, you can sustainably protect your outdoor spaces.