PlantFlying adults are only part of the problem. Focus on the moist growing medium where the immature stages develop.
Make sure the insects match the problem
Small dark flies hovering near potting mix may be fungus gnats, but insects around drains or fruit can be something else. Observe where they appear and whether activity increases when you disturb a pot. Yellow sticky cards near the medium can help monitor flying adults.
Sticky cards alone do not treat larvae in the root zone. Use them as a way to compare activity over time and identify which pots need attention. Keep adhesive traps out of reach of children, pets, and unintended wildlife.
Reduce unnecessary moisture
Check whether the mix stays continuously damp because of frequent watering, low light, or a large pot. Where the species tolerates it, allow the upper medium to dry appropriately between waterings. Empty saucers and remove decaying fallen leaves from the pot.
Do not force a moisture-loving plant into severe drought just to chase insects. Correct the growing setup and use a suitable targeted control if needed. Bottom watering is not a guaranteed cure because moisture can still remain available in the medium.
Choose controls labeled for the setting
Biological options can include products based on Bacillus thuringiensis israelensis or appropriate beneficial nematodes where available and labeled for the intended use. Their preparation, storage, and repeat timing are product-specific. Read the actual instructions rather than improvising a dose.
Avoid routine household mixtures or sprays aimed only at the flying adults. If you are unsure of the insect, get an identification before treating. In a larger collection, monitor neighboring pots so you are not repeatedly treating one while another remains a source.
Follow the trend over several checks
Adults may continue appearing while existing immature stages develop. A useful record includes trap counts or photos, watering changes, and treatment dates. A reduction over time tells you more than whether you saw one fly today.
Inspect new plants and stored potting supplies before bringing them into the collection. Store mixes as directed and avoid leaving open, wet material around growing areas. A consistent moisture-checking habit helps plants as well as pest management.