Fungus gnats are small, dark flying insects commonly found around houseplants, seedlings, propagation trays and greenhouse compost. While adult fungus gnats are mainly a nuisance, fungus gnat larvae cause the most damage by feeding on delicate plant roots and root hairs, resulting in stunted growth, wilting and seedling collapse.
Fungus gnats thrive in warm, moist growing media, particularly damp and peat-free compost. Female fungus gnats can lay hundreds of eggs, allowing infestations to develop rapidly. Their larvae can also contribute to the spread of soil-borne diseases such as Pythium.
Fungus gnat nematodes provide a natural, biological pest control solution, targeting fungus gnat larvae in the compost to help break the breeding cycle and reduce infestations without chemical insecticides.
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