Objective  Biological characteristics of Colletotrichum destructivum that infects Echeveria Perle von Nürnberg and in vitro toxicity of 6 fungicides on the pathogen were studied for the disease control.

  Method  Effects of temperature, pH, photoperiods, carbon, and nitrogen on the growth and 6 fungicides on their legality on C. destructivum were determined by an in vitro culture method.

  Result   The optimum growth conditions for C. destructivum were 30 ℃ at pH 8 on medium using starch for carbon and yeast for nitrogen resources. Photoperiods did not significant affect the mycelial growth. The 6 selected fungicides exhibited varying degrees of efficacy against C. destructivum. The EC₅₀ of fludioxonil at 0.023 6 mg·L⁻¹ was the most potent of them. It was followed by prochloraz at 0.030 6 mg·L⁻¹, pyraclostrobin at 0.048 7 mg·L⁻¹, thiophanate-methyl at 0.152 6 mg·L⁻¹, difenoconazole at 0.195 5 mg·L⁻¹, and carbendazim at 0.219 9 mg·L⁻¹.

  Conclusion  The growth of C. destructivum was affected by temperature, pH, carbon, and nitrogen and inhibited by fludioxonil, prochloraz, and pyraclostrobin.