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Fungus Gnats - Garden Insect Library - Saferbrand

Fungus Gnats

Adult fungus gnats are tiny, measuring no more than 1/8" in length. Fungus gnats have a very short lifespan. The adult female fungus gnat will lay up to 300 eggs in damp soil then in about a week or so, the adult male and female will die.


During their life span, fungus gnats carry plant disease from one host plant to another creating big problems for home gardeners. Eliminating these annoying pests can be a struggle. Using an organic pesticide such as Safer®Brand Yard and Garden Insect Killer can eliminate them organically.



Image courtesy of Oklahoma State University and Forestry
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Natural & Organic Controls


Safer® Brand Yard and Garden Insect Killer can help control an infestation of fungus gnats if they are spotted on your plants.


Sticky traps such as Safer® Brand Sticky Stakes are also an excellent method of controlling fungus gnats.



Safer® Brand Yard and Garden Insect Killer can help control fungus gnatsInsecticidal Soap (Potassium Salts of Fatty Acids) & Pyrethrin products such as Safer® Brand Yard and Garden Insect Killer - are the organic equivalent of a 1-2 knock down punch. Fungus gnats are tough bugs to kill. The soap will penetrate their shell enough to weaken and dehydrate the insect and allow the pyrethrin to absorb in to the insect and do its job.


Pyrethrin is a powerful nerve agent and will paralyze and kill the insect on contact. Keep in mind this soap is not like dish detergent, it's a base from a blend of natural plant sources and pyrethrin oils and comes from the chrysanthemum flower. An effective and organic combination...


Safer® Brand Sticky Stakes attract and trap fungus gnats in indoor houseplants when placed directly above the plant or directly into the soil at the base of the plant.



Spray Safer® Brand Yard and Garden Insect Killer as a contact killer. Use in accordance with directions on the product label.

Safer® Brand Sticky Stakes for fungus gnat control

Safer® Brand offers a variety of fungus gnat control products to help control and eliminate this garden pest and revive your plants. Please check out our fungus gnat control products for more details about how they work and how, when, and where they should be applied.


If you are concerned about a plant or unsure of how it will react to these solutions, test an inconspicuous area and wait 24 hours before full coverage. As a general rule, much like watering, do not use any liquid insecticides in the peak of the day or when temperatures exceed 90°F.


Place the Safer® Brand Sticky Stakes as soon as you see the first signs of fungus gnats.


Why Choose a Natural Solution?

Natural solutions break down quickly into their natural elements. They are preferable to chemical pesticides that leave residuals where they are sprayed causing long-term detrimental affects on the environment.





Natural Predators


Fungus gnats have a predator that actually is named for the tiny pest. Fungus Gnat Predators (Hypoaspis aculeifer) look particularly for fungus gnats as well as other garden pests.



Fungus Gnat Predators (Hypoaspis aculeifer) pierce the larvae and feed on their contents. Both adult and nymph fungus gnat predators will prey on the fungus gnat. These beneficial predators are usually sold commercially in shaker containers and spread over the soil. They will dig into the soil where they will dwell and females will lay their eggs.


Use caution when introducing predators in conjunction with insecticides. Spray an organic insecticide first, then introduce the predatory species to kill the rest of the infestation. Otherwise the insecticides may also kill these beneficial insects or arachnids.



If using commercially produced Fungus Gnat Predators, be sure to read and follow all instructions that accompany the product to find out when to disperse the mites on the plants. They are generally most effective when applied before fungus gnat populations become established or when populations are low.






Images courtesy of Oklahoma State University and Forestry
For a complete list of content sources please visit our site bibliography page



Safer®Brand brings you a variety of effective insect control products that are gentler on the environment! Most of them proudly display the OMRI Listed® organic seal and comply for use in organic gardening!


organic gardening products with the OMRI listed seal