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.
Symptoms of Fungus Gnat Damage
Adult fungus gnats may be seen flying around lighted areas. Symptoms of infestation of the fungus gnat adult and larvae in plants include poor growth, wilting, yellowed leaves and falling leaves.
Results of a Fungus Gnat Infestation
The most common problem with fungus gnats is that they carry plant diseases from one plant to another. Plant diseases may even be transported from one garden to another through fungus gnats.
The larvae can cause serious injury to a plant's roots, interfering with the plant's growth or causing the death of the plant.
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