Biological characteristics of Fusarium sulphureum, the pathogen of potato dry rot
马铃薯干腐病菌硫色镰孢的生物学特性

The paper deals with the effect of different carbon and nitrogen sources,pH and temperature on mycelium growth,mycelium dry weight and spore germination rate of Fusarium sulphureum,the causal agent of potato dry rot.The results showed that the optimum carbon and nitrogen sources for the pathogen mycelium growth on solid media were glucose and maltose,and peptone respectively with the most suitable pH 8.0.Maltose and NaNO3 were the optimum carbon and nitrogen resources for its mycelium growth in liquid media with the most suitable pH 6.0.The optimum carbon and nitrogen resources for spore germination were sodium carboxymethyl cellulose(CMC),peptone and glutamic acid(Glu) with the optimum pH 6.0-8.0.The optimum temperature was 25℃ for the pathogen growth on solid media or in liquid media.The lethal temperature for the conidia was 50℃ for 10 minutes.