吉林省玉米茎腐病危害损失及优势病原菌种类研究

STUDIES ON DAMAGE, YIELD LOSS AND DOMINANT PATHOGENS OF CORN STALK ROT IN JILIN

摘要:

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Pythium aphanidcrmatum、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。

Abstract:

Corn stalk rot occurs in corn in Jilin province. The earlier the infecting stage is and the moreserious the degree of disease is, the more yield loss occurs. The yield loss may be estimated by therate of infected plant at various growing stages and the degree of disease in field. In Jilin province, three fungi isolates, pythium aphanidermatum, Fusarium graminearum and F. moniliforme are themost frequently distributed and have the highest virulenty, being considered as the dominant pathogens of corn stalk rot.