【摘要】 采用菌落生长速率法,测定了2种保护性杀菌剂和4种内吸性杀菌剂对烟草黑胫病菌敏感菌株和4个抗甲霜灵突变株的EC50值,测定了抗甲霜灵烟草黑胫病菌突变株对5种杀菌剂的交互抗性。结果表明:抗甲霜灵烟草黑胫病菌突变株对代森锰锌有负交互抗性现象,对百菌清、霜脲氰、乙磷铝和霜霉威无交互抗性。更多还原

【Abstract】 In this study,the EC50 values to sensitive strain and 4 resistant-metalaxyl strains in Phytophthora nicotianae var.nicotianae of 2 unsystemic and 4 systemic fungicides were determined by the method of colonial growth-rate;the cross-resistances to 5 fungicides of the resistant-metalaxyl strains in P.nicotianae var.nicotianae were determined.The results showed that the resistant-metalaxyl strains in P.nicotianae var.nicotianae had negative cross — resistance to mancozeb,and had no cross-resistance to chlorothalonil,cymoxanil,fosetyl-Al,and propamocarb.更多还原