Sticky Traps for Adult Fungus Gnat Control

Sticky traps are a simple and effective way to capture adult fungus gnats. These traps won't solve the root problem (larvae in the soil), but they will help reduce the number of adult gnats and prevent further reproduction.

How it works: The traps use bright colours and a sticky adhesive surface to attract and capture flying adults.

Placement: Position the traps near your affected houseplants, especially in areas with high gnat activity.

Maintenance: Replace the sticky traps regularly to maintain their effectiveness.

Fungus Gnat Barrier Pumice

A natural, physical barrier like gnat barrier pumice can prevent adult gnats from laying eggs in the soil. This method stops the cycle at the source by preventing larvae from being deposited in the soil, reducing the chance of an infestation.

How it works: The fine pumice particles are abrasive and deter the gnats from accessing the soil to lay their eggs. It’s a safe and non-toxic solution.

Application: Sprinkle a thin layer of Yates Gnat Barrier Pumice (or any similar product) over the top of the soil in your plant pots.

Reapplication: Reapply as needed, especially after watering or if the layer thins out.

Hydrogen Peroxide for Larvae Elimination

To target the larvae living in the soil, hydrogen peroxide can effectively eliminate them.

How it works: Hydrogen peroxide kills the fungus gnat larvae in the soil while breaking down into harmless oxygen and water.

Application: First, let the top layer of soil dry out for 2-7 days to disrupt the environment preferred by the gnats .Mix a solution of 4 parts water to 1 part 3% hydrogen peroxide. Pour this solution into the pot, ensuring it reaches the soil where the larvae live.

Safety: The hydrogen peroxide in this dilution won’t harm your plants, but it will kill the larvae and prevent further infestations.

Additional Tips for Prevention and Management

Let Soil Dry: Fungus gnats thrive in moist environments, so allow the top layer of soil to dry between watering to discourage their growth.

Ensure Proper Drainage: Ensure your plant pots have good drainage to avoid water pooling at the bottom, which can create an ideal breeding ground for gnats.

Repot with Fresh Soil: Repotting your plants with fresh potting mix, like Oderings Houseplant Potting Mix, can help eliminate existing larvae and eggs in the soil.

Keep Indoor Areas Clean: Regularly remove fallen leaves, plant debris, and other organic matter to minimise potential hiding spots for gnats.

By implementing these strategies consistently, particularly every 4-5 weeks, you can disrupt the gnat life cycle and keep your plants safe from damage.

Fungus gnats can be frustrating, but with these natural, effective methods, you can keep your indoor garden healthy and pest-free through the winter months.