Why Houseplants Get Fungus Gnats and How to Fix It

The tiny black flies that mysteriously appear around houseplants are known by the scientific name "fungus gnats." Though they do not bite people, the adults reproduce quickly and the larvae feed on roots, posing a serious threat to plant health. To get rid of them completely, you have to start from the root cause, combining prevention and treatment.

Fungus GnatsCauses

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Fungus GnatsTreatment Methods

1.Hang double-layer sticky insect traps around the flower pot: the upper yellow layer lures adults, while the lower layer is coated with peppermint essential oil as a repellent; place an upside-down yellow sticky board at the base of the pot to catch escaping individuals.

2.Spread a 5mm layer of quartz sand or diatomaceous earth on the soil surface to form a barrier layer; larvae die from friction when breaking through the soil, and it also suppresses soil moisture evaporation.

32 - 3 months.

41000-fold dilution, once every 7 days, for 2 - 3 consecutive times, to kill larvae in deeper layers.

5.Buy Steinernema nematode suspension, dilute it and water the potting soil with it; the parasitic nematodes actively seek out and kill larvae, eco-friendly and pollution-free.

6.Introduce predatory mites into the pot, 3 - 5 per pot, to control egg hatching and larval growth.

Fungus Gnat Prevention Methods

140%

215 minutes, so the water permeates from the bottom up, reducing surface water accumulation.

360% or more, such as a mix of volcanic rock, maifan stone, and green zeolite, combined with 5% diatomaceous earth for pest prevention.

47 days, then treat preventively with an imidacloprid spray before moving them indoors.

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