Updated: July 19, 2023

Gnats are tiny flying insects that can quickly infest and damage your periwinkle plants. These pests are not only annoying but can also harm the health and growth of your beloved periwinkles. If you’re dealing with a gnat problem in your periwinkle plant, don’t worry! There are several effective methods you can use to get rid of these pesky insects and protect your plants. In this article, we’ll explore these methods and provide you with step-by-step instructions on how to eliminate gnats from your periwinkle plant.

Understanding Gnats

Before we delve into the methods to eliminate gnats, it’s important to understand a little bit about these insects. Gnats are small, delicate flies that belong to the family Sciaridae. They are attracted to moist environments and decaying organic matter, making them commonly found around houseplants, including periwinkles.

Gnats lay their eggs in damp soil, where they hatch into larvae known as “fungus gnats.” These larvae feed on organic matter and plant roots, causing damage to the root system of the periwinkle plant. The adult gnats, on the other hand, feed on plant sap and reproduce rapidly, leading to an infestation if left uncontrolled.

Step 1: Identify the Infestation

The first step in getting rid of gnats in your periwinkle plant is to identify the extent of the infestation. Check for signs such as adult gnats flying around the plant, larvae in the soil, or wilting leaves. Inspect the soil closely to spot any small white larvae crawling around.

Step 2: Adjust Watering Habits

Gnats thrive in moist environments, so adjusting your watering habits can help reduce their numbers. Avoid overwatering your periwinkle plant as this can create a perfect breeding ground for gnats. Allow the top inch of soil to dry out before watering again. Additionally, ensure proper drainage by using well-draining soil and pots with drainage holes.

Step 3: Remove Infested Soil

To eliminate larvae and eggs, you’ll need to remove the infested soil from the periwinkle plant. Carefully take out the plant from its pot, gently shake off the excess soil, and inspect the roots for any signs of damage or larvae. If you spot any larvae, rinse the roots with lukewarm water to dislodge them.

Dispose of the infested soil by sealing it in a plastic bag and discarding it in an outdoor trash bin. Be cautious not to contaminate other plants or areas while removing the soil.

Step 4: Apply Beneficial Nematodes

Beneficial nematodes are microscopic worms that can help control gnat populations in your periwinkle plant. These worms are natural predators of fungus gnat larvae and can be purchased from garden centers or online suppliers. Follow the instructions provided on the packaging for application guidelines.

Typically, you will need to mix the nematodes with water and apply them to the infested soil using a watering can or sprayer. The nematodes will seek out and attack the larvae, effectively reducing their numbers over time.

Step 5: Create Traps

Another effective method to catch adult gnats is by setting up traps. There are various trap options available, including sticky traps or homemade traps using apple cider vinegar or fruit juice as bait.

For sticky traps, simply place them near your periwinkle plant, ensuring they are elevated above the plant’s foliage. The gnats will be attracted to the trap and get stuck on the adhesive surface.

To create a homemade trap, fill a shallow dish with apple cider vinegar or fruit juice and add a few drops of dish soap. The gnats will be attracted to the scent and will drown in the liquid due to the dish soap breaking the surface tension.

Step 6: Keep the Area Clean

To prevent future infestations, it’s crucial to maintain a clean environment around your periwinkle plant. Remove any fallen leaves or debris from the soil surface regularly, as these can provide a breeding ground for gnats.

Wipe down any nearby surfaces and ensure there are no spills or excess moisture that can attract gnats. Regularly clean your pots and containers to remove any organic matter or residue that may harbor gnat eggs or larvae.

Step 7: Use Natural Gnat Repellents

Several natural repellents can help deter gnats from infesting your periwinkle plant. These include essential oils such as neem oil, peppermint oil, or lavender oil. Dilute a few drops of the chosen oil in water and spray it on the plant and surrounding areas. The strong scent will repel gnats and discourage them from landing on your periwinkle plant.

Step 8: Monitor and Repeat

After implementing these methods, continue monitoring your periwinkle plant for any signs of gnats. It may take some time to completely eliminate the infestation, so be patient and persistent. If necessary, repeat the steps outlined above until the gnats are fully eradicated.

By following these steps, you can effectively get rid of gnats in your periwinkle plant and ensure its health and vitality. Remember that prevention is key, so maintaining good watering habits and a clean environment will help prevent future gnat infestations. Happy gardening!