期刊文献+

First Report of <i>Stemphylium vesicarium</i>Causing Onion Stemphylium Leaf Blight in Ethiopia

First Report of <i>Stemphylium vesicarium</i>Causing Onion Stemphylium Leaf Blight in Ethiopia
下载PDF
导出
摘要 A suspected fungal disease was observed on onion leaves during survey in onion fields of the central rift valley of Ethiopia in the offseason in 2019. The disease symptoms were round to oval small spots on onion leaves which coalesce to form blighted leaves that change to brown lesion and black sporulation with time. The disease was of high incidence (up to 95.2%) and severity (up to 4.67) where in some fields it has been causing early plant senescence and reduced bulb size during harvest with massive yield loss, named to be “Yeshinkurt Ebola” to mean “Ebola of onion” by farmers. Dirty white to light grey front colony color and light brown to deep brown reverse colony color with alternative white and brown band fungal growth were isolated from infected onion leaf samples. The conidia were olive brown, oval to ovoid, oblong and ovoid to oblong are born on conidiophores. Pathogenicity of the pathogen was confirmed on 45-days-old onion (cv. Nafis) plant, and it was identified as Stemphylium vesicarium based on cultural, morphological and pathogenic results. This is the first report of S. vesicarium, the causative agent of onion stemphylium leaf blight. A suspected fungal disease was observed on onion leaves during survey in onion fields of the central rift valley of Ethiopia in the offseason in 2019. The disease symptoms were round to oval small spots on onion leaves which coalesce to form blighted leaves that change to brown lesion and black sporulation with time. The disease was of high incidence (up to 95.2%) and severity (up to 4.67) where in some fields it has been causing early plant senescence and reduced bulb size during harvest with massive yield loss, named to be “Yeshinkurt Ebola” to mean “Ebola of onion” by farmers. Dirty white to light grey front colony color and light brown to deep brown reverse colony color with alternative white and brown band fungal growth were isolated from infected onion leaf samples. The conidia were olive brown, oval to ovoid, oblong and ovoid to oblong are born on conidiophores. Pathogenicity of the pathogen was confirmed on 45-days-old onion (cv. Nafis) plant, and it was identified as Stemphylium vesicarium based on cultural, morphological and pathogenic results. This is the first report of S. vesicarium, the causative agent of onion stemphylium leaf blight.
出处 《Agricultural Sciences》 2019年第8期1104-1112,共9页 农业科学(英文)
关键词 Stemphylium vesicarium ONION Prevalence SEVERITY PATHOGENICITY Stemphylium vesicarium Onion Prevalence Severity Pathogenicity
  • 相关文献

参考文献1

二级参考文献22

  • 1Bose, T. K., and Som, G. M. 1986. Vegetable Crops in India. Calcutta, India: NayaProkash, 567-9.
  • 2Castellanes, L. J. J., Auchet-Jencens, F., and Garcia-Correosa, I. 1988. "Effect of Alternaria porri. (Ell.) Cif. on Onion Seed Production under Experimental Condition in Cuba." Rev. PlantPathol. 67: 2730.
  • 3Meah, B., and Khan, A. A. 1987. "Checklist of Vegetables and Fruit Diseases in Bangladesh." M.Sc. thesis, Department of Plant Pathology, Bangladesh Agricultural University, Mymensingh.
  • 4Munoz, D. C. L., Martinez, J. J. P., and Perez, A. P. 1984. "Onion Seed Production under Tropical Conditions." Humbalst lnst. Fund. Res. Trop. Agric. Acad Sci. 10 (2): 42-5.
  • 5Tomaz, I. L., and Lima, A. L. 1986. "An Important Disease of Onion Caused by Stemphylium vesicarium (Wallr.) Simmons in Portugal." Proc. Portugal Hortic. 58 618.
  • 6Bangladesh Agricultural Research Institute. 1997. "On Farm Trial on the Integrated Approach to Control Purple Blotch of Onion Seed Crop."'Present at the Abstracts of Plant Pathology Research, 1986-2005, Plant Pathology Division, BARI, Joydebpur, Bangladesh.
  • 7Food and Agricultural Organization (FAO). 2012. Production Year Book for 2012. Rome: FAO.
  • 8Bangladesh Bureau of Statistics (BBS). 2006. Statistical Year Book of Bangladesh for 2012. Dhaka, Bangladesh: Statistics Division, Ministry of Planning, Government of Peoples Republic of Bangladesh.
  • 9Hashemi, P., Kumar, P., Mwakutuya, E., Banniza, S., Sarker, A., and Vandenberg, A. 2004. "StemphyliumBlight of Lentil: Should You Be Worried?" Present at the Abstract of Pulse Days 2004 on Securing Success: Shaping the Pulse Industry of the Future, Saskatchewan Pulse Growers, January 12-13, 2004. Saskatoon. Saskatchewan, Canada.
  • 10Borges, O. L., Stanford, E. H., and Webster, R. K. 1976. "The Host-Pathogen Interaction of Alfalfa and Stemphylium botryosum." Phytopathology 66 (6): 749-53.

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部