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本文报道了1982年以来吉林省玉米茎腐病发生、损失情况以及优势病原菌种类的研究结果。玉米茎腐病在吉林省玉米自交系、杂交种以及农家品种上均有发生,发生时期、发生程度不同,产量损失也不同,据此可估计某品种在当地的产量损失。在分离到的真菌中,以瓜果腐霉菌Pythiumaphanidcrmatum、禾谷镰刀菌Fusarium graminearum 和串珠镰刀菌F.moniliforme 的分离频率最高,致病作用最强,因此认为上述三种菌为吉林省玉米茎腐病的优势病原菌。
This paper reports the results of the research on the occurrence and loss of maize stalk rot and the types of dominant pathogens in Jilin Province since 1982. Corn stalk rot occurred in maize inbred lines, hybrids and peasant breeds in Jilin Province. Occurrence period, degree of occurrence and yield loss were also different. Therefore, the yield loss of a certain breed could be estimated. Among the isolated fungi, Pythiumaphanidcrmatum, Fusarium graminearum and Fusarium moniliforme had the highest separation frequency and pathogenicity, so these three strains were considered as Jilin stem rot The predominant pathogen of disease.