HU Kaifeng,ZHANG Xueyan,YAO Xue,et al.Isolation,Identification and Indoor Pesticide Screening of the Pathogen Causing Eggplant Wilt Disease in Heilongjiang Region[J].Northern Horticulture,2025,(20):108-117.[doi:10.11937/bfyy.20251359]
黑龙江地区茄子黄萎病病原菌的分离鉴定及室内药剂筛选
- Title:
- Isolation,Identification and Indoor Pesticide Screening of the Pathogen Causing Eggplant Wilt Disease in Heilongjiang Region
- 文章编号:
- 1001-0009(2025)20-0108-10
- Keywords:
- eggplant; Verticillium dahliae; pathogenicity; bactericide
- 分类号:
- S 436.411
- 文献标志码:
- A
- 摘要:
- 以疑似茄子黄萎病病株为试材,根据柯赫氏法则,结合形态学和分子生物学特征,将分离获得的15株分离物鉴定为大丽轮枝菌(Verticillium dahliae)。采用浸根接种法对15株病原菌进行致病力测定,以期为实现对病害的可持续控制提供参考依据。结果表明:EP-A、EP-B、EP-C、EP-1、EP-3、EP-5、EP-7、EP-8、EP-10、EP-11、EP-12、EP-13和EP-77-3为Ⅰ型强致病力菌株,占测试菌株的86.67%,Ⅱ型中等致病力的菌株有EP-59-2和EP-11-3,占测试菌株的13.33%,该次试验分离未得到弱致病力菌株。通过室内毒力测定筛选防控药剂,结果显示6种药剂对茄子黄萎病菌的毒力大小顺序为稳腾>爱苗>醚菌酯>陈米妙收>美甜>三唑酮。其中稳腾(30%肟菌·戊唑醇)和爱苗(30%丙环唑·苯醚甲环唑)的抑制率最强,EC50值为0.30 μg·mL-1和0.38 μg·mL-1。三唑酮(15%三唑酮)效果最差,EC50值为59.55 μg·mL-1。
- Abstract:
- Taking suspected eggplant wilt disease plants as the test materials,according to Koch′s rule,combined with morphological and molecular biological characteristics,15 isolated strains were identified as Verticillium dahliae.Fifteen strains of pathogenic bacteria were tested for pathogenicity by using the root soaking inoculation method,in order to provide reference for achieving sustainable control of diseases.The results showed that types I,EP-B,EP-C,EP-1,EP-3,EP-5,EP-7,EP-8,EP-10,EP-11,EP-12,EP-13,and EP-77-3 were highly pathogenic strains,accounting for 86.67% of the tested strains.Type Ⅱ,moderately pathogenic strains included EP-59-2 and EP-11-3,accounting for 13.33% of the tested strains,no weak pathogenic strains were obtained in this isolation.The results of laboratory virulence test showed that the order of virulence of 6 kinds of agents to the pathogen of eggplant Verticillium wilt was:Wenteng>Aimiao>kresoxim-methyl>Amimiao Shou>Meisweet>Triadimefon.Among them,Wenteng (30% oxime bacteria·tebuconazolee) and Aimiao (30% Propiconazole·Phenyl Ketoconazole) had the strongest inhibitory effect,with EC50 value of 0.30 μg·mL-1 and 0.38 μg·mL-1.Triadimefon was the least effective,with an EC50 value of 59.55 μg·mL-1.
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备注/Memo
第一作者简介:胡凯凤(1989-),女,硕士,助理研究员,现主要从事茄子育种与栽培等研究工作。E-mail:hukaifeng2009@126.com.责任作者:曲红云(1972-),女,硕士,研究员,现主要从事茄子育种与栽培等研究工作。E-mail:qzqx2002@163.com.基金项目:黑龙江省农业科技创新跨越工程农业科技基础创新资助项目(CX22YQ10);黑龙江省农业科技创新重点攻关资助项目(CX23GG05)。收稿日期:2025-04-11