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当前位置: 首页 > 文章 > 生长季马铃薯植株冠层空气中Alternaria solani分生孢子飞散动态及其影响因素 植物病理学报 2014,44 (6) 687-692
Position: Home > Articles > The dynamics of airborne conidia of Alternaria solani in potato canopy and its influence factor during growing season Acta Phytopathologica Sinica 2014,44 (6) 687-692

生长季马铃薯植株冠层空气中Alternaria solani分生孢子飞散动态及其影响因素

作  者：
周岱超;赵振杰;胡同乐;朱杰华;曹克强
单  位：
河北农业大学植物保护学院
关键词：
马铃薯早疫病;Aternaria solani;孢子飞散动态
摘  要：
对生长季马铃薯冠层空气中Aternaria solani(Ell.&G.Martin)分生孢子的数量和马铃薯早疫病发生程度进行了系统调查,并对空气中分生孢子数量与早疫病发生程度之间的相关性以及影响空气中分生孢子数量的因素进行了分析。结果表明:在马铃薯出苗至收获(6~8月份)期间,当病情指数低于4时两者之间呈显著线性相关关系,随着病情指数的增高二者的线性相关性降低。天气条件对空气中A.solani分生孢子数量的影响明显,通常降雨2 d后空气中孢子的数量会有一个高峰,日平均气温(地上2 m)低于18℃的条件下,空气中孢子数量会显著减少。一天中6∶00 am至16∶00 pm空气中A.solani分生孢子数量较多,17∶00 pm至次日5∶00 am孢子数量较少,分别占全天总量的60.95%和39.05%,各小时孢子飞散量占全天比例与空气相对湿度呈显著负相关,而与空气温度呈显著正相关。
译  名：
The dynamics of airborne conidia of Alternaria solani in potato canopy and its influence factor during growing season
作  者：
ZHOU Dai-chao;ZHAO Zhen-jie;HU Tong-le;ZHU Jie-hua;CAO Ke-qiang;College of Plant Protection,Agricultural University of Hebei;
关键词：
potato early blight;;Aternaria solani;;dynamics of airborne conidia
摘  要：
The quantity of airborne conidia of Alternaria solani( Ell. & G. Martin) in potato canopy,the severity of potato early blight and the correlation betw een them as w ell as the influence factor w ere investigated and analyzed systematically during the grow ing season. The results show ed that from potato emergence to harvest( June-August),the quantity of airborne conidia of A. solani in the canopy had significant linear correlation w ith the disease progress of potato early blight w hen the disease index below 4,and the correlation declines as the disease index increasing. The w eather conditions had significant effect on the quantity of airborne conidia of A. solani in potato canopy. Generally,a peak of airborne conidia of A. solani could appear in 2 days after rain.The airborne conidia w ere remarkably reduced w hen the daily average temperature( 2 m above ground) w as below 18℃. The quantity of airborne conidia of A. solani in the canopy w as also different at the different time in a day,there w ere more conidia in the air from 6∶ 00 am to 16∶ 00 pm,and few er during 17∶ 00 pm to 5∶ 00 am the follow ing day,w hich count 60. 95% and 39. 05% of the total conidia were trapped during the w hole day,respectively. The proportion of conidia of A. solani dispersed in to the air at each hour in a day had a significant negative correlation with relative air humidity and positive correlation with air temperature.

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