Gnatrol WDG is listed by the Organic Materials Review Institute (OMRI) for use in organic production. Apply it to the top 2 inches of soil as a drench every 5 days until the adults are not flying around anymore. They're fine little bugs -- annoying, but completely harmless -- and I'm trying to be less of a speciesist about bugs. I introduced a few new plants and the gnats must have hitched a ride because soon I had an infestation and it was getting progressively worse.

You will be killing all of you beneficial microbes if you do, which will severely stunt your plants growth.Gnatrol WDG Biological Larvicide is a highly selective, biological larvicide for use in greenhouses to control fungus gnat larvae. Bacillus thuringiensis subspecies israelensis strain AM 65-52 solids, spores and insecticidal toxins 37. Easier to prevent an infestation with lower, preventative doses than to try and knock it down once you're over run by gnats.

If the item comes direct from a manufacturer, it may be delivered in non-retail packaging, such as a plain or unprinted box or plastic bag. This year I'm overwintering some larger potted plants that were outside and taking an rooting cuttings from them, so I will have more coir real estate for gnats. However, since all ornamental plant species have not been evaluated, sensitivity to Gnatrol WDG should be checked on several plants prior to wide scale usage.As you can see, the plant is barely larger now than it was many months ago; this is almost certainly due to the gnat larvae feeding at the root. In situations where all life forms (eggs, larvae, pupae and adults) are present, such as with existing infestations, make three (3) weekly applications at the suggested range rate for heavy infestations. insecticide that contains the naturally occurring bacterium Bacillus thuringiensis subspecies israelensis. The infestation for that had gotten so bad that I enclosed it into two sandwich bag, partially to serve as a greenhouse, but partially because there were so many gnats coming out of this plant it was clear that the roots were thoroughly infested.