烟草黑胫病菌对甲霜灵的敏感性测定  

Sensitivity test of Phtophthora parasitica var nicoianae to Metalaxyl

作　　者：袁宗胜[1] 张广民[1] 刘延荣[1] 陈松涛 

机构地区：[1]山东农业大学,泰安271018

出　　处：《中国烟草科学》2001年第4期9-12,共4页Chinese Tobacco Science

基　　金：国家烟草专卖局资助项目(961023)

摘　　要：烟草黑胫病菌(Phytophthoraparasiticavarnicotianae)对甲霜灵的敏感性测定结果表明:所测菌株菌丝生长对甲霜灵都存在不同程度的敏感性,Ec50值平均为0.2132μg/mL,Ec95值平均为6.5623μg/mL,但不同菌株对甲霜灵的敏感性不同,Ec50值范围在0.0573～0.8485μg/mL之间,相差15倍左右。Ec95值的范围在2.3393～21.8051μg/mL之间,相差9倍左右。其中以9734-1、9716-3和9706-2的耐药性最明显。甲霜灵对烟草黑胫病菌孢子囊的产生也有明显的抑制作用,5.0μg/mL的甲霜灵对烟草黑胫病菌的产孢抑制率为100%。通过甲霜灵对烟草黑胫病菌继代培养物的测定也证明了烟草黑胫病菌对甲霜灵的耐药性。The sensitivity of Phtophthora parasitica var nicoianae to metalaxyl was tested.The result showed that the mycelial growth of tested strains were sensitive to metalaxyl.However,the sensitive degree was different be-tween these strains.The range of EC50and EC95values were0.0573-0.8485μg /mL and2.3993-21.8051μg /mL respectively.Metalaxyl could evidently inhibit the formation of sporangia.The inhibitory rates of5.0ug /ml metalaxyl to the formation of sporangia of P.parasitica var nicoianae was100%.The tolerance of P.parasitica var nicoianae to metalaxyl was proved by the test on the further generation of the fungus.

关 键 词：烟草黑胫病菌 甲霜灵 敏感性 耐药性 

分 类 号：S435.72[农业科学—农业昆虫与害虫防治]