Triazole fungicides inhibit growth and sclerotial production of Phymatotrichum omnivorum at concentrations in the parts per billion range. Slow release formulations of these fungicides enhance soil persistence and are less phytotoxic then regular commercial formulations. Slow release formulations of propiconazole at I lb a.i./acre, applied in the furrow had 9.2% dead plants at harvest time, compared to 84.0% in the checks. All fungicides reduced disease in one test, but XE-779 reduced seedling emergence and caused stunting.