浙江农业学报 ›› 2025, Vol. 37 ›› Issue (11): 2315-2324.DOI: 10.3969/j.issn.1004-1524.20250101

• 植物保护 • 上一篇    下一篇

辣椒炭疽病病原菌分离鉴定及防治药剂筛选

刘亚婷1(), 吴立东1,2, 邱胤晖1, 陈国钰1, 钟柳青1,*()   

  1. 1.三明市农业科学研究院,福建 三明 365509
    2.福建省(山区)作物遗传改良与创新利用重点实验室,福建 三明 365509
  • 收稿日期:2025-02-11 出版日期:2025-11-25 发布日期:2025-12-08
  • 作者简介:刘亚婷(1989—),女,浙江丽水人,硕士,助理研究员,主要从事蔬菜遗传育种研究工作。E-mail: 598288001@qq.com
  • 通讯作者: *钟柳青,E-mail: 303721640@qq.com
  • 基金资助:
    福建省农业引导性项目(2023N0046)

Pathogens identification of pepper anthracnose and fungicide screening

LIU Yating1(), WU Lidong1,2, QIU Yinhui1, CHEN Guoyu1, ZHONG Liuqing1,*()   

  1. 1. Sanming Academy of Agricultural Sciences, Sanming 365509, Fujian, China
    2. Fujian Key Laboratory of Crop Genetic Improvement and Innovative Utilization of Mountain Area, Sanming 365509, Fujian, China
  • Received:2025-02-11 Online:2025-11-25 Published:2025-12-08

摘要: 为明确福建省三明市辣椒炭疽病的病原菌,筛选出有效的防治药剂,为辣椒炭疽病的科学防治提供依据,本研究从当地主产区采集辣椒炭疽病病果,通过组织分离法分离纯化病原菌,利用形态学特征观察,并结合多基因序列(ITS、ACTCHS-1、TUB2、GAPDHCAL)联合构建系统发育树进行病原菌鉴定,采用菌丝生长速率法和田间防效试验测定10种杀菌剂对病原菌的抑菌效果和田间防效。结果表明,引起研究区辣椒炭疽病的病原菌为暹罗炭疽菌(Colletotrichum siamense)。室内毒力测定结果表明,24%双胍·吡唑酯可湿性粉剂的抑菌效果最好,有效中浓度(EC50)为0.176 mg·L-1;其次为30%苯甲·吡唑酯悬浮剂、60%唑醚·戊唑醇水分散粒剂和17%唑醚·氟环唑悬浮剂,EC50分别为0.263、0.367、0.371 mg·L-1。在田间防效试验中,第3次药后7 d,30%苯甲·吡唑酯悬浮剂和50%咪鲜胺铜盐悬浮剂对辣椒炭疽病的防治效果最好,分别为91.51%和90.83%,其次为24%双胍·吡唑酯可湿性粉剂。综上,30%苯甲·吡唑酯悬浮剂和24%双胍·吡唑酯可湿性粉剂可作为研究区内防治辣椒炭疽病的首选药剂,可交替使用。

关键词: 辣椒炭疽病, 暹罗炭疽菌(Colletotrichum siamense), 药剂筛选, 防治效果

Abstract:

To identify the causal pathogen of pepper anthracnose in Sanming City, Fujian Province, China, and to screen out effective fungicides for disease control, diseased fruits were collected from major production areas. The pathogen was isolated and purified by tissue separation, and was identified through morphological characterization and multilocus phylogenetic analysis (ITS, ACT, CHS-1, TUB2, GAPDH and CAL). Antifungal activities of 10 fungicides were evaluated by using the mycelial growth inhibition method, as well as their field efficacy. It was shown that the pathogen was identified as Colletotrichum siamense. In vitro toxicity tests revealed that the 24% guazatine pyraclostrobin wettable powder exhibited the highest inhibitory effect, with a median effective concentration (EC50) of 0.176 mg·L-1, which was followed by 30% difenoconazole pyraclostrobin suspension concentrate (EC50 of 0.263 mg·L-1), 60% azoxystrobin + tebuconazole water dispersible granules (EC50 of 0.367 mg·L-1), 17% azoxystrobin epoxiconazole suspension concentrate (EC50 of 0.371 mg·L-1). In field trials, 30% difenoconazole pyraclostrobin suspension concentrate and 50% prochloraz-copper salt suspension concentrate demonstrated the highest control efficacy of 91.51% and 90.83%, respectively, on the 7th day after the third application, which was followed by 24% guazatine pyraclostrobin wettable powder. Therefore, 30% difenoconazole pyraclostrobin suspension concentrate and 24% guazatine pyraclostrobin wettable powder could be used as preferred agents to control pepper anthracnose in peppers, and should be used alternately.

Key words: pepper anthracnose, Colletotrichum siamense, fungicide screening, control efficacy

中图分类号: