摘要： 对2004年7月采自河北省围场县甘沟门、棋盘山、哈里哈村和围场县马铃薯研究所试验地及温室的26个马铃薯晚疫病菌株进行甲霜灵敏感性评价。敏感性测定结果表明,在26个被测菌株中高抗菌株23个,占被测菌株的88.5%;高度敏感菌株、敏感菌株和中抗菌株各1个,分别占被测菌株的3.85%。对甲霜灵高抗菌株在病菌群体中占绝对优势,而且抗性程度很高,浓度为100μg/mL的甲霜灵对46.2%的被测菌株没有任何抑制效果。交配型的测定结果表明2004年采自河北省围场县的26个菌株全部为A1交配型。

关键词: 马铃薯晚疫病菌, 甲霜灵, 敏感性, 交配型

Abstract: The sensitivity to Metalaxyl and pathogenicity of 26 Phytophthora infestans isolates collected from Weichang County,Hebei in 2004 was evaluated.The results suggested that 23 strains were highly resistant to the fungicide Metalaxyl,accounting for 88.5%,the others were highly sensitive,sensitive and intermediately resistant to Metalaxyl,respectively,each accounting for 3.85%.The P.infestans population in 2004 was dominated by the strains with highly resistance to Metalaxyl.Metalaxyl,even of the concentration of 100 μg/mL,could not inhibit the growth of 46.5% tested strains.The result of mating type test indicated that all the isolates from Weichang in 2004 were A1.

Key words: Phytophthora infestan, Metalaxyl, Sensitivity, Mating type

中图分类号: 

• S435.32