贵州省烟草黑胫病菌对烯酰吗啉的敏感性  

Sensitivity of Phytophthora nicotianae var.nicotianae to dimethomorph in Guizhou

作　　者：苏凯[1] 桑维钧[1] 张新强 潘滴滴 王慧[1] 

机构地区：[1]贵州大学农学院,贵州山地农业病虫害重点实验室,贵阳550000 [2]甘肃省天水市秦州县林业局,天水741000 [3]贵州省镇远县农业局,镇远557700

出　　处：《植物保护》2013年第1期154-158,165,共6页Plant Protection

基　　金：中国烟草总公司贵州省公司项目“有机烟综合技术研究与开发”(200901);贵州省烟草有害生物种类调查与防治技术研究(2010-2014)

摘　　要：为了明确烟草黑胫病菌对烯酰吗啉的敏感性现状,从贵州省各地采集了47株烟草黑胫病菌株,分别测定了菌丝生长和游动孢子囊形成对烯酰吗啉的敏感性。结果表明,烯酰吗啉对烟草黑胫病菌菌丝生长和孢子囊形成的抑制基本一致,对菌丝EC50范围为0.792 6～4.232 7μg/mL,平均为2.476 8μg/mL;对孢子囊的抑制作用略强,EC50范围为0.394 5～4.625 3μg/mL,平均值为2.040 0μg/mL。统计分析表明,烟草黑胫病菌47个菌株菌丝生长和孢子萌发对烯酰吗啉的敏感性符合正态分布,不同菌株对烯酰吗啉的敏感性有显著差异,而且菌株对烯酰吗啉的敏感性与其地理来源有一定的相关性。To confirm the sensitivity of Phytophthora nicotianae var. nicotianae to dimethomorph, forty seven isolates of P. nicotianae var. nicotianae were collected from several areas in Guizhou Province, and sensitivity of mycelial growth and zoosporangia formation to dimethomorph were measured. The results showed that dimethomorph could inhibit the mycelial growth and sporangium formation of P. nicotianae var. nicotianae, for mycelial growth, with a mean EC50 value of 2. 476 8μg/mL,ranging from 0. 792 6 μg/mL to 4. 232 7 μg/mL; and for sporangium formation, with a mean EC50 value of 2. 040 0 μg/mL,ranging from 0. 394 5 μg/mL to 4. 232 7μg/mL. Sensitivity of these isolates to dimethomorph was fitted well with a normal distribution function. There were significant differences in the sensitivity of different strains to dimethomorph, and moreover there was a correlation between strain sensitivity and its geographical origin.

关 键 词：烟草黑胫病菌 烯酰吗啉 敏感性 

分 类 号：S435.72[农业科学—农业昆虫与害虫防治] S482.2[农业科学—植物保护]