4种生物农药对党参根腐病菌的室内毒力测定  

Toxicity of 4 kinds of Bio-pesticides to Pathogenic Fungi of Codonopsis pilosula Root Rot Disease

作　　者：许彦[1] 曹剑[1] 刘露[1] 覃贵勇[1] XU Yan;CAO Jian;LIU Lu;QIN Gui-yong(Chongqing Three Gorges Polytechnic College,Wanzhou Chongqing 404155,China)

机构地区：[1]重庆三峡职业学院,重庆万州404155

出　　处：《植物医生》2021年第2期18-22,共5页Plant Doctor

基　　金：重庆市教委科学技术研究项目(KJQN201803502).

摘　　要：党参根腐病是一种严重的真菌类病害,直接导致党参大量减产,影响其经济价值.前期研究分离并鉴定出重庆市奉节县党参根腐病菌为腐皮镰刀菌(Fusarium solani).基于此,本试验采用菌丝生长速率法测定了井冈霉素、四霉素、春雷霉素、多抗霉素等4种生物农药对编号为CQ-4和CQ-13的2个菌株的室内毒力.结果显示,4种生物源农药对CQ-4和CQ-13均表现出显著抑制作用,且呈现浓度依赖性.28%井冈霉素可溶粉剂对CQ-4抑制效果最强,EC 50为0.095 g/L,0.3%四霉素水剂次之;10%多抗霉素可湿性粉剂对CQ-13的抑制效果最强,EC 50为0.138 g/L,0.3%四霉素水剂次之.研究结果为党参根腐病的生物防治提供了参考依据.Root rot of Codonopsis pilosulais a serious fungal disease,which can lead to yield reduction of the crop and affect its economic value.In order to provide reference for the control of this disease,the authors isolated the pathogen of root rot of C.pilosula and identified it as Fusarium solani in their previous work.In this experiment,the antifungal activities of 4 biological pesticides to 2 physiological racesof the pathogen(CQ-4 and CQ-13)were determined with flat plate assay.The results showed that all the 4 pesticides exhibited strong concentration-dependent antifungal activities against CQ-4 and CQ-13.The soluble powder of 28%jinggangmycin had the strongest inhibitory effect on CQ-4,with an EC 50 of 0.095 g/L,followed by the aqueous solution of 0.3%tetramycin.The water powder of 10%dobicamycin had the strongest inhibitory effect on CQ-13,with an EC 50 of 0.138 g/L,followed by the aqueous solution of 0.3%tetramycin.

关 键 词：党参根腐病 生物农药 杀菌剂 毒力测定 

分 类 号：S482.7[农业科学—农药学]