- Vacuum them up. This is the most effective way to remove hoverfly nests, as it will suck up all of the eggs, larvae, and pupae. Be sure to vacuum up any areas where you have seen hoverflies flying or landing, as this is where they are most likely to build their nests.
- Spray them with a pesticide. There are a number of pesticides that can be used to kill hoverflies and their nests, such as permethrin, cyfluthrin, and deltamethrin. Be sure to follow the directions on the pesticide label carefully, and wear protective clothing when applying the pesticide.
- Use a natural repellent. There are a number of natural repellents that can be used to keep hoverflies away from your home and yard, such as peppermint oil, lemongrass oil, and citronella oil. Mix a few drops of the essential oil with water in a spray bottle, and spray it around the areas where you have seen hoverflies.
- Remove any standing water. Hoverflies are attracted to standing water, so it is important to remove any standing water from your property. This includes emptying any birdbaths or wading pools, and keeping your gutters clean.
- Prune back any overgrown plants. Hoverflies like to lay their eggs in tall grass and other overgrown plants, so it is important to prune back any overgrown plants around your home and yard.
- Install screens on your windows and doors. This will help to keep hoverflies from getting inside your home.