葱紫斑病发生及防治若干问题的初步研究 Ⅱ.病斑产孢、孢子飞散传播  

Preliminary Studies on Regularity and Control of Aternaria porriⅡ.Spore Production of Lesion and Spread of Spores

作　　者：白庆荣[1] 朱琳[1] 温嘉伟[1] 王兴录[2] 牟喜涛 杨信东[1] 

机构地区：[1]吉林农业大学农学院,长春130118 [2]吉林农业大学教研基地管理处,长春130118 [3]长春市种子管理站,长春130031

出　　处：《吉林农业大学学报》2007年第4期364-367,共4页Journal of Jilin Agricultural University

基　　金：吉林省科技发展计划项目(20050812)

摘　　要：对葱紫斑病的病斑产孢、孢子飞散传播等进行了研究。结果表明:葱紫斑病的病斑在温度为25～28℃时的产孢能力最强,而在30～35℃时的产孢能力较差;葱紫斑病的病斑产孢量随着保湿时间的增长而增多;施氮、钾肥的植株产生的病斑的产孢量要小于不施肥及施磷肥的植株上产生的病斑的产孢量;病斑在黑暗条件下的产孢量明显高于在散射光条件下的产孢量;葱紫斑病的病斑在6～9日龄时产孢能力较强,其中8日龄病斑的产孢能力最强,而1～3日龄的病斑产孢能力较弱;病斑在夜间的的孢子释放量明显多于在白天的释放量。葱紫斑病在田间呈聚集型分布。Spore production of lesion and spread of spores of Aternar/a porti were studied. Results showed that sporocladium capacity of lesion was the highest at 2,5--28℃ and low at 30--35℃ ;The spomcladium capacity of lesion increased with the increase of wetting time. Nitrogen and potassium could make lesion produce less spores than non-fertilizer and phosphrate. The lesion coulit produce more spores in black light than in astigmatism. 6--9 day lesion was of strong sporocladium capacity, that of the 8 day lesion was the highest and that of the 1--3 day lesion was weak. Spores set out more at night than during the day. The lesion took on a distribution of aggregation in the field.

关 键 词：葱紫斑病 温度 保湿时间 肥料 光照 产孢 聚集分布 

分 类 号：S436.33[农业科学—农业昆虫与害虫防治]