How to control fungus gnats?
Need an effective treatment against fungus gnats ? Here's our step-by-step guide to control them without toxic products in indoor plants or small greenhouses.
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You will need :
•Sprayer
Natural predators :
•Nematodes for fungus gnats
You will need :
•Sprayer
Natural predators :
•Nematodes for fungus gnats
First watering
Introduce the nematodes
Introduce the first part of the nematodes into all the plants.
Install the sticky traps
Install the yellow sticky traps to control adult fungus gnats.
Second watering
Introduce the nematodes
At the next watering, introduce the second part of the nematodes into all the plants.
Third watering
Introduce the nematodes
At the next watering, introduce the third part of the nematodes into all the plants.
Fourth watering
Introduce the nematodes
At the next watering, introduce the fourth part of the nematodes into all the plants.
Monitoring and prevention
Monitor
Use sticky traps to detect the presence of fungus gnats. The number of fungus gnats trapped each week allows you to monitor the efficacy of the treatment.
Prevent
Once fungus gnats are eradicated, continue monitoring. Ideally, introduce stratiolaelaps to prevent reinfestation.
First watering
Introduce the nematodes
Introduce the first part of the nematodes into all the plants.
Install the sticky traps
Install the yellow sticky traps to control adult fungus gnats.
Second watering
Introduce the nematodes
At the next watering, introduce the second part of the nematodes into all the plants.
Third watering
Introduce the nematodes
At the next watering, introduce the third part of the nematodes into all the plants.
Fourth watering
Introduce the nematodes
At the next watering, introduce the fourth part of the nematodes into all the plants.
Monitoring and prevention
Monitor
Use sticky traps to detect the presence of fungus gnats. The number of fungus gnats trapped each week allows you to monitor the efficacy of the treatment.
Prevent
Once fungus gnats are eradicated, continue monitoring. Ideally, introduce stratiolaelaps to prevent reinfestation.
Predators
How do I introduce the natural predators ?
The usage instructions may vary by product. Consult the product page for details.
Treatment
Should I replace my plant's substrate?
We do not recommend replacing potting soil. Removing sciarid eggs and larvae which are found in the substrate offer little benefit compared to the stress caused to the plant.
Should I use diatomaceous earth?
The action of diatomaceous earth is not long enough to treat fungus over a complete life cycle. It will also be harmful to predators.
What should I do if I still have fungus gnats after this treatment?
The failure of a nematode treatment against fungus gnats indicates that the insect benefits from particularly favorable conditions for proliferation. Space out waterings to allow the substrate to dry completely and limit the development of algae.