I need help with fungus gnats in organic soil

Parasites controlled by insecticide-impregnated pet collars
Depending on the active ingredients they contain, collars are efficient against fleas, ticks, mites and lice. Some collars protect pets also against mosquitoes, black flies, gnats ( = gnats, = Simuliids), midges (= Culicoides), sandflies and other flying parasites.
 
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