Adult fungus gnats are mainly a nuisance, but their larvae live in potting mix and may damage tender roots, especially in seedlings or heavily infested plants.
Assess the situation
- Look for adults hovering just above moist soil rather than only around fruit.
- Check whether seedlings are wilting or failing to thrive; overwatering itself can also be the cause.
- Correct chronic wetness when the plant tolerates a drying interval.
- Remove dead plant material and keep drainage trays emptied.
- Use labeled larval controls if needed, rather than relying only on adult sticky traps.
Keep in mind
Do not let moisture-sensitive plants dry severely merely to eliminate insects.
Frequently asked question
Do the adult gnats bite people?
Common fungus gnats associated with houseplants do not usually bite humans.
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