贵州南部地区禾草云斑病的发生规律

A preliminary study on the regularity of outbreak of Rhynchosporium secalis in south area of Guizhou.

经过１９９４～１９９７年对匍茎剪股颖草坪禾草云斑病（Ｒｈｙｎｃｈｏｓｐｏｒｉｕｍｓｅｃａｌｉｓ）田间病情的定点调查研究，摸清了禾草云斑病的发生规律。结果表明，病菌以休眠菌丝体在病株及病残体上越冬。在贵州南部地区，匍茎剪股颖草坪禾草云斑病可于４月下旬始见发生，全年病情有两次高峰。第１高峰期出现在５月下旬至７月上旬，第２高峰期山现在９月。病害程度的轻重主要与当年４～１０月份的气温及降水有密切关系。

Investigation has been made on Rhynchospo rium secalis of Agrostis stolonifera turf in the field from 1994 to 1997. The results show that the germs live through winter in sick remanent plants as resting mycelium. It begins at last ten days of April in south area of Guizhou. Two peaks of occurrence have been observed, from last ten days of May to first ten days of July and September. The serious degree of disease has close relation to annual rainfall and atmospheric temperature.