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农学学报 ›› 2024, Vol. 14 ›› Issue (6): 5-12.doi: 10.11923/j.issn.2095-4050.cjas2023-0240

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贵阳市烟草黑胫病病原菌生理小种和交配型鉴定及药剂防治筛选

祖庆学(), 黄宁, 冯裕洋, 张翼飞, 康耀文, 秦敏, 王艺焜()   

  1. 贵州省烟草公司贵阳市公司,贵阳 550000
  • 收稿日期:2023-11-12 修回日期:2023-12-22 出版日期:2024-06-19 发布日期:2024-06-19
  • 通讯作者:
    王艺焜,女,1993年出生,贵州贵阳人,硕士,主要从事烤烟栽培、调制与加工工作。通信地址:550300 贵州省贵阳市开阳县城关镇磷都大道98号 贵州省烟草公司贵阳市公司,E-mail:
  • 作者简介:

    祖庆学,男,1979年出生,贵州毕节人,农艺师,硕士,主要从事烟叶生产与病虫害绿色防控工作。通信地址:550300 贵州省贵阳市开阳县城关镇磷都大道98号 贵州省烟草公司贵阳市公司,E-mail:

  • 基金资助:
    贵阳市烟草公司科技项目“基于黑胫病/青枯病群体结构的烟草绿色防控技术研究”(2021-04)

Identification of Physiological Race and Mating Type of Pathogen of Tobacco Black Shank Disease and Screening of Drug Control in Guiyang

ZU Qingxue(), HUANG Ning, FENG Yuyang, ZHANG Yifei, KANG Yaowen, QIN Min, WANG Yikun()   

  1. Guiyang Tobacco Company of Guizhou Province, Guiyang 550000, Guizhou, China
  • Received:2023-11-12 Revised:2023-12-22 Online:2024-06-19 Published:2024-06-19

摘要:

研究贵阳市烟草黑胫病的生理小种和交配型的组成情况,为贵阳市的黑胫病提供药剂防治基础。采用组织分离法从贵州省贵阳市烟区罹患黑胫病的烟株中分离出病原菌并纯化鉴定,对分离所得菌株进行分子鉴定、交配型测定、生理小种鉴定,结合皿内化学药剂敏感性筛选和田间药效试验测定不同药剂对烟草黑胫病的防治效果。采自贵阳市5个不同烟区的69株烟草黑胫病样本,经分离鉴定得到48株烟草疫霉菌。5个代表菌株都为A1交配型,2株为0号生理小种、3株为1号生理小种。皿内化学药剂的毒力测定和田间药效试验均表明,乙蒜素·松脂酸铜对烟草疫霉的抑制作用强于代森锰锌、烯酰吗啉、精甲霜灵、氟菌·霜霉威和壳聚糖。

关键词: 烟草黑胫病, 生理小种, 交配型, 药剂筛选, 防治效果

Abstract:

The study aims to determine the physiological races and mating types of tobacco black shank disease in Guiyang City, in order to establish a foundation for the treatment of black shank disease in the area. The pathogen causing black shank disease was isolated and purified from tobacco plants affected in the tobacco-growing region of Guiyang City, Guizhou Province. The isolated strains were subjected to molecular identification, mating type determination, physiological race identification, and sensitivity testing to chemical agents in vitro. Field trials were conducted to evaluate the efficacy of different agents in controlling black shank disease in tobacco plants. Samples of tobacco black shank disease were collected from 69 plants in 5 different tobacco-growing areas in Guiyang City. After isolation and identification, 48 strains of Phytophthora nicotianae were obtained. All 5 representative strains belonged to the A1 mating type, with 2 strains being of physiological race 0 and 3 strains being of physiological race 1. The toxicity test and field efficacy test of the chemical agents in the dish showed that the inhibitory effect of ethylicin·copper oleate against P. nicotianae was better than mancozeb, dimethomorph, metalaxyl-M, fluopicolide·propamocab hydrochloride and chitosan.

Key words: tobacco black shank, physiological race, mating type, fungicide screening, control effect