Common Questions About Fungus Gnats
How long does Gnatrol WDG take to work?
Gnatrol kills larvae within 24–48 hours.
Visible results typically appear in 7–10 days as adult gnats die off.
Why do I need to make applications every 5-7 days?
Gnatrol only kills larvae while they are actively feeding, and each application remains effective for a limited time.
Reapplying every 5–7 days ensures newly hatched larvae are targeted, breaking the life cycle over 2–3 weeks.
Is it safe to use Gnatrol WDG indoors around people-pets?
Safe for indoor use • Pet friendly
BTI specifically targets fungus gnat larvae and does not harm people, pets, or plants.
Should I continue to use Gnatrol after Gnats are gone?
Yes — monthly use helps keep fungus gnats from coming back.
Ideal when adding new plants, fresh soil, or moving plants between indoor and outdoor environments.
Will water with Gnatrol mixed in it be good for a long time?
No — once mixed with water, you should use it the same day.
BTI loses effectiveness within 72 hours.
Only mix what you need.