河北、吉林两省马铃薯晚疫病菌对3种杀菌剂的敏感性测定  

Testing for Sensitivity to Three Fungicides in Phytophthora infestans from Two Provinces of Hebei and Jilin

作　　者：陈良华[1] 杨志辉[1] 丁明亚 朱杰华[1] 韩彦卿[1] 孙祥瑞[1] 吴婧莲[1] 

机构地区：[1]河北农业大学植物保护学院,河北省农作物病虫害生物防治工程技术研究中心,河北保定071001 [2]河北省围场县马铃薯研究所,河北围场068550

出　　处：《中国农学通报》2009年第13期171-174,共4页Chinese Agricultural Science Bulletin

基　　金：河北省自然科学基金"马铃薯和番茄晚疫病菌寄主专化性研究"(C2007000463)

摘　　要：采用菌落直径法测定了河北省和吉林省部分马铃薯产区的晚疫病菌对嘧菌酯、精甲霜灵和甲霜灵的敏感性。结果表明两省被测的97个晚疫病菌株对嘧菌酯均表现为敏感。在被测的河北围场65株晚疫病菌株中,多数对精甲霜灵高抗,其中高抗、中抗和敏感比例分别为72.3%、26.2%和1.5%,而在被测的32株吉林长春菌株中,多数对精甲霜灵敏感,其中敏感、中抗和高抗菌株所占比例分别为81.3%、15.6%和3.1%。在被测的35株河北省围场县晚疫病菌对甲霜灵的敏感性中,所有菌株都为抗性菌株,并且高抗菌株占97.1%;而在18株吉林长春晚疫病菌株中,多数为敏感菌株,其中敏感、中抗和高抗比例分别为77.8%、16.7%和5.5%。研究还发现精甲霜灵和甲霜灵对部分高抗菌株具有刺激菌丝生长的作用。Sensitivities to the azoxystrobin, mefenoxam and metalaxyl of Phytophthora infestans were tested for isolates collected from some areas of two Provinces of Hebei and Jilin, using an in vitro radical growth assay on fungcide-amended agar media. All tested 97 isolates from two provinces were sensitive to azoxystrobin. Of 65 isolates from Weichang county of Hebei province, the most ones were mefenoxam-resistant and the percentages of highly-resistant, intermediate-resistant and sensitive were separately 72.3%, 26.2% and 1.5%. Of 35 strains from Changchun city of Jilin province, however, majority was mefenoxam-sensitive and the percentages of sensitive, intermediate-resistant, and resistant strains were 81.3%, 15.6% and 3.1%, respectively. Of the 35 isolates sampled from Weichang county of Hebei province, all isolates were resistant to metalaxyl and the percentage of highly-resistant ones was 91.7%. Of 18 isolates sampled from Changchun city, major isolates were sensitive to metalaxyl and the percentages of sensitive, intermediate-resistant and highly-resistant ones were separately 77.8%, 16.7% and 5.5%, It was also detected that mefenoxam and metalaxyl could make mycelia grow well in the rye medium.

关 键 词：嘧菌酯 精甲霜灵 甲霜灵 致病疫霉 敏感性测定 

分 类 号：S432.2[农业科学—植物病理学]