嘧菌酯对稻瘟病菌的生物活性  

Azoxystrobin Biological Activity Against the Rice Blast Pathogen

作　　者：张舒亚[1] 周明国[1] 李红霞[1] 张传清[1] 王建新[1] 

机构地区：[1]南京农业大学农药科学系,南京210095

出　　处：《农药》2005年第6期274-277,共4页Agrochemicals

基　　金：农业部"948"项目(2001-207);国家863项目(2001AA249041)

摘　　要：嘧菌酯对稻瘟菌菌丝生长、孢子萌发、产孢量、孢子致病力和黑色素合成具有强烈的抑制作用。嘧菌酯离体活性受培养基组分影响,可酵解碳源具有拮抗作用。SHAM对嘧菌酯抑制孢子萌发的活性具有增效作用。嘧菌酯对稻瘟菌63个菌株的EC50为0.0010～0.0906μg/ml,平均EC50为0.0223μg/ml。盆钵试验表明,秧苗对嘧菌酯的商品制剂25%嘧菌酯具有良好的内吸性;兼有保护作用和治疗作用。25%嘧菌酯对稻瘟菌有一定的田间防效,且对水稻增产作用明显。Azoxystrobin strongly inhibited mycelia growth, conidia germination, conidia production and pathogenicvirulence, and melanin biosynthesis in the rice blast pathogen, Magnaporthe grisea. Azoxystrobin activity in vitro wasaffected by compostion of the culture media, due to antagonism by fermentable carbon sources. SHAM enhancedinhibition by azoxystrobin of conidia germination. Azoxystrobin EC50 ranged from 0.0010 to 0.0906 μg/ml for 63M. grisea isolates, with a mean EC50 of 0.0223 μg/ml. Pot experiments showed that an azoxystrobin 25% commercialformulation was readily absorbed by rice seedlings, providing good protective and curative efficacy. In the field,azoxystrobin 25% provided a degree of efficacy against M. grisea and a significant rice yield increase.

关 键 词：嘧菌酯 稻瘟病菌 生物活性 

分 类 号：S435.111[农业科学—农业昆虫与害虫防治]