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Nematodes (SF) are live, microscopic non-segmented round worms that come in a bag mixed with a powder substance. They are parasitic predators for fungus gnat and thrip eggs. They can be used for both active infestations or preventatively.
One packet contains approximately 50 million nematodes and can treat approximate 50-70 plants depending on the amount applied to each plant. Applying nematodes is not recommended if you have plants in LECA, pon, moss, perlite, or water.