I recently ran into a problem that I seem to be having some difficulty resolving. I run hydro-buckets that are top fed by drip rings. A couple weeks ago I found fungus gnat larvae residing within each bucket. I did some research and found that beneficial nematodes would help resolve this problem, however all cases discussed pertained to soil growing mediums (I use expanded clay balls). I obtained some nematodes from my local garden shop, and following the directions exactly I treated my plants.
I kept the nematodes refridgerated
I applied them in the dark
I mixed the nematode mix with water to apply
I waited for about a week before I checked the fungus gnat situation again, this way the nematodes were not exposed to any more light than necessary. Unfortunately when I did check, the fungus gnat larvae were still present, however their population had declined.
I was wondering if anyone has any experience with fungus gnats in hydro systems, or with nematodes in hydro systems, and may have a solution for my problem or an idea of the effectiveness of nematodes as a biological control in hydro systems.
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Nematodes for fungus gnats
Posted 19 December 2009 - 04:00 PM
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