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I imagine many of you have tried beneficial nematodes for fungus gnats and/or thrips. I have had good success with the Sf species, purchased from Arbico Organics.
I just wanted to mention here a total failure of a new method of packaging these nematodes. Nematode Beads:
These things supposedly have a long shelf life and don't need to be refrigerated.
I used them, as directed, on June 6th. At this point, the fungus gnat population in my grow has exploded. The fuckers are all over the place -- getting caught in sticky trichs. A bit of a population explosion before a fast drop in population is typical, because to establish nematodes in soil, the soil is kept moist for several days to a week, which excites the fungus gnats.
Anyway, let the buyer beware. At this point after an application, the fungus gnat population should be near zero. I just sent for another pack of the normally packaged, non-bead nematodes, from a different vendor.
I just wanted to mention here a total failure of a new method of packaging these nematodes. Nematode Beads:

NemAttack™ Beads - Sf Nematodes
NemAttack Beads Steinernema feltiae Beneficial Nematodes are live microscopic organisms (non-segmented round worms) that occur naturally in soil throughout the world. The beneficial nematodes we sell are parasitic to insect pests that typically have a developing (larval or pupal) stage of...
www.arbico-organics.com
These things supposedly have a long shelf life and don't need to be refrigerated.
I used them, as directed, on June 6th. At this point, the fungus gnat population in my grow has exploded. The fuckers are all over the place -- getting caught in sticky trichs. A bit of a population explosion before a fast drop in population is typical, because to establish nematodes in soil, the soil is kept moist for several days to a week, which excites the fungus gnats.
Anyway, let the buyer beware. At this point after an application, the fungus gnat population should be near zero. I just sent for another pack of the normally packaged, non-bead nematodes, from a different vendor.