贵州省稻瘟病菌生理小种对稻瘟灵敏感性检测  

Analysis on sensitivity of Magnaporthe grisea pathogenic race in Guizhou to isoprothiolane

作　　者：常耀强[1] 李明[2] 郭真香[1] 

机构地区：[1]贵州大学精细化工研究开发中心,贵州贵阳550025 [2]贵州大学作物保护研究所,贵州贵阳550025

出　　处：《广东农业科学》2013年第10期73-75,79,共4页Guangdong Agricultural Sciences

基　　金：国家公益性行业(农业)科研专项(200903033-08)

摘　　要：稻瘟病菌对防治药剂的敏感性可因生理小种的变化而改变。利用水稻稻瘟病菌鉴别品种对2012年采自贵州省开阳、桐梓和黄平3地的30个稻瘟病菌有效单孢分离菌株进行接种鉴定,3地共鉴定出3群13个生理小种,其中开阳县的优势小种为ZA1,桐梓县的优势小种为ZA11,黄平县的优势小种为ZB15。菌丝生长速率法和孢子萌发法对稻瘟灵的敏感性测定结果显示,桐梓县的稻瘟病菌对稻瘟灵表现为最不敏感,EC50平均值为4.21μg/mL;黄平县的稻瘟病菌对稻瘟灵表现最为敏感,EC50平均值为2.59μg/mL。同一地区的不同生理小种对稻瘟灵的敏感性不同,不同地区相同生理小种对稻瘟灵的敏感性也不同,同一地区相同生理小种对稻瘟灵的敏感性也有一定差异。The sensitivity of the rice blast fungus on fungicide may be changed because of the variety of pathogenic race. Thirty isolates obtained from rice blast specimen collected from 3 areas-Huangping,Kaiyang, Tongzi in Guizhou Province were assessed through inoculation. The sensitivities of above isolates were investigated using suppression method of mycelium growth rate and conidia germination in the present study. The results showed that the total 3 race populations including 13 different races were identified. The predominant race of Kaiyang, Tongzi and Huangping was ZAI, ZAll,and ZBIs, respectively. And the most insensitiveness isolates to isoprothiolane was scored from Tongzi area, the average EC50 was 4.21 μg/mL.The most sensitiveness isolates to isoprothiolane was scored from Huangping area,the average ECro was 2.59 μg/mL. The sensitivity of different pathogenic race in same area to isoprothiolane were different. The sensitivity of same pathogenic race in the different areas to isoprothiolane was also different. There were also particular differences in the sensitivity of same pathogenic race in the same area.

关 键 词：稻瘟病菌 生理小种 敏感性 

分 类 号：S435.111.4[农业科学—农业昆虫与害虫防治]