Fungus gnats are most commonly found in which type of environment?

Fungus gnats are commonly found in potted plants because they thrive in moist environments where organic matter is abundant. These pests are attracted to the rich, wet soil that often makes up potting mixes, which provides the ideal conditions for their larvae to feed on the organic material and decaying roots. The presence of moisture from plant watering also creates a perfect habitat for fungus gnat larvae.

In contrast, while other environments can host different types of insects, they are not the preferred or common habitats for fungus gnats. For example, decayed wood may support some pests but is less favorable than the conditions found in potted plants. Similarly, stored grain environments are more conducive to pests like weevils or other grain insects, and areas under rocks could harbor various life forms, but they do not typically offer the specific moisture and organic content that fungus gnats require for their lifecycle.