Summit Chemical Mosquito Bits

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Kill fungus gnats in potted plants
Summit Mosquito Bits® is a popular biological control that kills mos­quito larvae in standing water. But it also kills fungus gnats in potted plants. The active ingredient in Mosquito Bits® is BTI (Bacillus thuringiensis israelensis), a naturally occurring bacterium that’s deadly to both mosquito larvae and fungus gnat larvae.

BTI quickly kills fungus gnat larvae that infest potted plants. To control fungus gnats, simply shake the granular Mosquito Bits® onto the potting soil in houseplants and other container-grown plants. Mosquito Bits® can also be mixed with potting soil prior to planting. When the plants are watered, the BTI in the Mosquito Bits® is released. Fungus gnat larvae feed on the BTI and die.

Mosquito Bits® are made by Summit Responsible Solu­tions®, which also makes Mosquito Dunks®. Both products are available at home centers, hardware stores, garden centers and online at

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