福建省致病疫霉交配型分布及对甲霜灵的抗药性  

Distribution of mating type and metalaxyl-resistance of Phytophthora infestans in Fujian

作　　者：陈庆河[1] 翁启勇[1] 谢世勇[1] 兰成忠[1] 卢同[1] 

机构地区：[1]福建省农业科学院植物保护研究所,福州350013

出　　处：《植物保护学报》2004年第2期151-156,共6页Journal of Plant Protection

基　　金：福建省自然科学基金(B0210031);福建省科技厅重大项目(2000Z006);福建省农业厅项目(200102)资助

摘　　要：为明确福建省致病疫霉 Phytophthora infestans(Mont.)de Bary 交配型分布及对甲霜灵的抗性情况,对1999～2002年分离的致病疫霉进行了交配型和抗药性水平测定。发现福建省同时存在致病疫霉的 A1、A2两种交配型菌株,被测定的89个菌株中,73个菌株为 A1交配型,16个为 A2交配型,分别占82.1%和17.9%;对甲霜灵抗药性测定表明,高抗、中抗和敏感菌株分别占36.0%、48.3%、15.7%,不同菌株对甲霜灵的敏感程度差异很大;离体测定对甲霜灵的敏感性表明,1.0μg/mL 甲霜灵对敏感菌株的平均防治效果为68.7%,而500μg/mL 浓度对高抗菌株的防治效果仅为69.7%,说明致病疫霉对甲霜灵产生高抗药性。The distribution of mating type and metalaxyl-resistance of Phytophthora infestansisolated during 1999-2002 in Fujian were investigated.The results showed that both A1 andA2 mating types existed in Fujian.Amongst 89 isolates tested,73 were A1 mating type,16were A2.The frequency of A1 and A2 were 82.1%,17.9%,respectively.The test for metal-axyl-resistance indicated that the proportion of resistant,intermediate and sensitive were36.0%、48.3%、15.7%,respectively.The metalaxyl-resistance of different isolates weremarkedly different,the systemic protection value of metalaxyl at 1.0 μg/mL to sensitive iso-lates was 68.7%,however,that of metalaxyl at 500 μg/mL to resistance isolates was 69.7%.Results strongly indicated that metalaxyl-resistance has seriously developed in Phytophthora in-festans.

关 键 词：福建 致病疫霉 交配型 分布 甲霜灵 抗药性 晚疫病 马铃薯 番茄 

分 类 号：S432.44[农业科学—植物病理学]