苜蓿锈菌夏孢子的生物学特性及杀菌剂对其室内毒力测定  

Biological characteristics of the uredospores of alfalfa rust and toxicity test of different fungicides in the laboratory

作　　者：雒富春 袁庆华[2] 王瑜[2] 沈慧敏[1] 

机构地区：[1]甘肃农业大学草业学院,兰州730070 [2]中国农业科学院北京畜牧兽医研究所,北京100193

出　　处：《植物保护》2014年第5期96-99,共4页Plant Protection

基　　金："十二五"国家科技支撑计划项目(2011BAD17B01);公益性行业(农业)科研专项(201303057)

摘　　要：采用孢子萌发法对引起苜蓿锈病的病原菌进行了生物学特性研究，并采用不同的杀菌剂进行了室内毒力测定。研究表明：在100％相对湿度下，苜蓿锈菌夏孢子在5～30℃都能萌发，但温度在20～25℃萌发最快；光照和1％葡萄糖液有促进孢子萌发的作用；不同杀菌剂室内毒力测定研究表明，吡唑醚菌酯和嘧菌酯效果最好，其 EC50分别为0．0401、0．0681 mg/L。The biological characteristics of the uredospores of alfalfa rust were studied using the uredospores ger-mination method.The results showed that the most suitable temperature for germination was 20 -25 ℃ under 100% relative humidity;light and 1% glucose solution had promotion effect on spore germination.The toxicity test showed that pyraclostrobin and azoxystrobin had good effects on the uredospores of alfalfa rust,with an EC50 value of 0.040 1 mg/L and 0.068 1 mg/L,respectively.

关 键 词：苜蓿锈病 生物学特性 杀菌剂 毒力测定 

分 类 号：S435.4[农业科学—农业昆虫与害虫防治]