小麦玉蜀黍赤霉的比较研究

用墨西哥、斯里兰卡、印度尼西亚和中国的玉蜀黍赤霉[Gibberella zeae (Schw.)Petch]对42个中国品种和116个墨西哥品种麦穗进行接种。两年结果说明,墨西哥和中国菌株间致病力的差异显著。中国菌株的致病力最强,墨西哥菌株最弱,印度尼西亚菌株与斯里兰卡菌株介于两者之间。因此,在不同病害流行区可能存在不同的生态型。此外,国内外菌株的培养性状也有相应的差异。

COMPARATIVE STUDIES ON THE ISOLATES OF GIBBELLA ZEAE (SCHW.) PETCH OF WHEAT FROM MEXICO,SRILANKA,INDONESIA AND CHINA

Isolates of Gibberella zeae (Schw.) Peteh from Mexico, Srilanka, Indonesia and China were inoculated on 42 Chinese and 116 Mexican wheat varieties during the heading stage.The standard technique of testing the reaction of wheat head to scab organism was used. Results indicated that the Chinese isolate was much more virulent than the Mexican isolate, while the isolate from Indonesia and Srilanka were intermedium between them. Besides, correponding differences between cultural characteristics were also found among the isolates. It is probablely that the causal organism of wheat scab disease may differentiate into ecotypes in different epidemic areas.