Occurrence and Pathogenic Identification of Puccinia coronata var.coronata Corda on Perennial Ryegrass in Jiangsu Regions

[Objective] Pathogen identification and disease regularity of perennial ryegrass rust in Jurong area of Jiangsu Province was conducted.[Method] Perennial ryegrass rust occurred in Science and Technology Demonstration and lawn greening band of campus in Jiangsu Polytechnic College of Agriculture and Forestry in Jurong region of Jiangsu Province were randomly investigated and their incidence laws were observed.[Result] Perennial ryegrass rust had the most serious occurrence in June each year in Jurong area of Jiangsu Province,the tender perennial ryegrass sowed this year were more susceptible to the disease than the perennial ryegrass with two years generation;Puccinia coronata var.coronata Corda was confirmed to be the pathogen of perennial ryegrass rust;when the temperature was about 25 ℃,it was the best condition for the occurrence of rust disease,when the temperature was over 35 ℃,the disease would reduce or stop.[Conclusion] Perennial ryegrass rust was first reported in Jiangsu Province.

吉林省的一种新病害——由冠柄锈菌引起的早熟禾锈病

在吉林省长春市吉林农业大学的草坪草上发现由冠柄锈菌原变种引起的早熟禾锈病。该病害为吉 林省新记录。

江苏地区黑麦草冠柄锈病的发生和病原鉴定

[目的]对江苏句容地区黑麦草锈病进行病原菌鉴定和发病规律研究。[方法]分别对2008年和2009年5月中旬至10月在江苏省句容市江苏农林职业技术学院科技示范园和校园的草坪绿化带发生的黑麦草锈病进行随机调查和发病规律观察。[结果]在江苏句容地区,黑麦草锈病每年6月份发生最严重,当年播种的幼嫩黑麦草比2年生成丛黑麦草更易感病;确定冠柄锈菌(Puccinia coronata var. coronata Corda)为句容地区的黑麦草锈病病原菌;25℃左右最适合锈病发生,当气温超过35℃时,病害减轻或停止。[结论]黑麦草锈病在江苏省为初次报道。