If you have house or office plants and have ever seen small, dark-colored insect swarming around them, your plants could have fungus gnats.
Fungus gnats are tiny flies that as adults, resemble mosquitoes. Fungus gnats don't bite people, but their presence can be annoying. Their larval stage lives in wet, overly moist potting mix, where they feed on decaying matter.
The first step to managing fungus gnats is allowing the soil in your houseplants to dry out in between watering. To read more about how to manage this pest, visit the UC IPM publication Pest Notes: Fungus Gnats.
[From the July 2014 issue of the UC IPM Retail Nursery & Garden Center News]
Fungus gnats are small flies that infest soil, potting mix, or plants grown in pots or containers (Figure 1). Your customers may complain about fungus gnats resting on or swarming around plants or soil or flying around windows in their houses.
Adult fungus gnats don't harm plants or people, but they can be annoying. On the other hand, fungus gnat larvae (Figure 2), which live in soil and feed on roots, can be damaging when their numbers are very high, sometimes causing plants to wilt. Their feeding.../span>