Outdoor temperatures are below freezing right now, but indoors temperatures are comfortable for humans and houseplants but also plant pests.
The most common houseplant pest is that small, black, fly-like insect, the annoying fungus gnat.
There are four developmental stages in the life cycle of a fungus gnat: egg, larva, pupa and adult. Eggs can be brought indoors in used potting media. Eggs are tiny…