To assess the risk of maize white spot disease(MWSD)in China,suspected MWSD samples were iso-lated from different areas of the country,and the epidemiology of the white spot was evaluated by using disease resis-tance identification and meteorological data,and the taxonomic status of the maize white spot pathogen in Tengzhou,Shandong Province,was determined by morphological characterization and molecular identification.The results showed that ST-1,the causal agent of MWSD in Tengzhou,Shandong Province,and WS-191,the causal agent of MWSD in Yunnan Province,are the same as Epicoccum latusicollum.The optimal growth temperature is 25-28 ℃,with a pH range of 5-7.Meteorological data analysis showed that the average temperature of April-September in China's eight maize producing areas are between 10-30 ℃,suitable for MWSD epidemic.Furthermore,in the south-west maize regional test,among 645 new varieties 377 ones were moderately-highly resistant,accounting for 58.44％,268 ones were susceptible-highly susceptible varieties,accounting for 41.56％.In summary,all major maize producing areas in China have conditions for MWSD,and there is a risk of a large-scale epidemic.
MaizeMaize white spotPathogen identificationEpicoccum latusicollumRisk analysis
NETL
NSTL
万方数据
