Biological characteristics of Monilia fructigena as pathogen of brown rot in sweet cherry

Brown rot is occurring seriously in some areas of Liaoning which is one of the main sweet cherry producing areas.The biological characteristics of Monilia fructigena of sweet cherry brown rot was studied in order to provide the basis for further study and prevention of this disease.In this study,mycelia growth,spore production and spore germination were detected in relation to temperature,illumination,pH and nutritional conditions.The results showed that the optimum temperature for mycelia growth of pathogen was 25 ℃;PSA was the best of the 8 culture media in the experiment;the Optimum pH was 6.0;dark condition was suitable for mycelia growth.PDA,xylose,NH4H2PO4,25 ℃ and pH 6.0 were the best for spore production.The rate of spore germination was highest under this condition which includes the optimum carbon sources,nitrogen source,temperature and pH: amidulin,NH4H2PO4,25 ℃ and pH 7.0.The mycelium could not survive at 56 ℃ for 10 min.