Characterization of Verticillium dahliae Isolates and Wilt Epidemics of Pepper

Plant Disease
R G BhatK V Subbarao

Abstract

Epidemics of Verticillium wilt in pepper fields of the central coast of California and isolates of Verticillium dahliae associated with these epidemics were characterized. The mean incidence of wilted plants per field ranged from 6.3 to 97.8% in fields with Anaheim, jalapeno, paprika, or bell peppers. In general, incidence of wilt in jalapeno and bell pepper crops was lower than in crops of other types of pepper. Inoculum density of V. dahliae in the surveyed pepper fields ranged from 2.7 to 66.6 microsclerotia g-1 dry soil, and the correlation between disease incidence and density of microsclerotia was high (r = 0.81, P < 0.01). Distribution of Verticillium wilt was aggregated in a majority of the pepper fields surveyed, but the degree of aggregation varied. Vegetative compatibility group (VCG) characterization of 67 isolates of V. dahliae indicated that 67% belonged to VCG 2, 22% to VCG 4, and 11% to a new group, designated VCG 6. The pathogenicity of isolates of V. dahliae from bell pepper and tomato plants was tested by inoculating 1-month-old bell pepper (cv. Cal Wonder) and tomato (cv. EP 7) seedlings and incubating the inoculated plants in the greenhouse. Seedlings of bell pepper were susceptible only to the isolates of ...Continue Reading

References

Oct 24, 2008·Phytopathology·Krishna V Subbarao
Oct 24, 2008·Phytopathology·R G Bhat, K V Subbarao
Apr 1, 1998·Plant Disease·Leah Tsror LahkimMarina Hazanovsky

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Citations

Sep 25, 2020·Molecular Plant-microbe Interactions : MPMI·Jie-Yin ChenXiao-Feng Dai
Oct 24, 2008·Phytopathology·Qing-Ming QinKrishna V Subbarao
Oct 24, 2008·Phytopathology·M Collado-RomeroR M Jiménez-Díaz
Jul 12, 2013·FEMS Microbiology Letters·Ioannis A PapaioannouMilton A Typas
Apr 7, 2016·Phytopathology·Michael G MilgroomRafael M Jiménez-Díaz
Mar 1, 2005·Plant Disease·Gary E ValladKrishna V Subbarao
Oct 1, 2010·Plant Disease·Matteo CirulliRafael M Jiménez-Díaz
Apr 24, 2009·Annual Review of Phytopathology·Steven J KlostermanKrishna V Subbarao
Jan 11, 2013·Phytopathology·Glenna M MalcolmMaría Del Mar Jiménez-Gasco
Nov 22, 2013·Current Genetics·Ioannis A PapaioannouMilton A Typas
Oct 21, 2020·Phytopathology·Laura S Bautista-JalónMaría Del Mar Jiménez-Gasco
Apr 24, 2021·Annual Review of Phytopathology·Jie-Yin ChenKrishna V Subbarao
Oct 15, 2010·Fungal Biology·Hongxia ZhengQihan Wu

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