First Report of Anthracnose Caused by <i>Colletotrichum truncatum</i> on Bell Pepper (<i>Capsicum annuum</i>) in Pakistan

Tariq, Aliya; Naz, Farah; Rauf, C. A.; Irshad, Gulshan; Abbasi, Nadeem Akhtar; Khokhar, N. M.

doi:10.1094/pdis-07-16-0996-pdn

Cited by 7 publications

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“…in Asia identified 11 species of Colletotrichum including three novel species, C. javanense, C. makassarense, and C. tainanense (De Silva et al, 2019). Of these species, C. truncatum had already been identified as a major pathogen of chili and its pathogenicity was determined by Diao et al (2017), Mongkolporn et al (2010), Montri et al (2009), Ranathunge et al (2012), andTariq et al (2017). C. truncatum produces falcate spores that can be readily identified microscopically.…”

Section: A Previous Study On Taxonomy and Phylogeny Of Thementioning

confidence: 99%

Pathogenicity of Colletotrichum species causing anthracnose of Capsicum in Asia

2021

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Anthracnose of chili is caused by a complex of Colletotrichum species, with recent surveys reporting at least 28 different species implicated. However, there have been very few studies to identify the relative pathogenicity of the various species or to optimize a bioassay to assess pathogenicity. A detached Capsicum fruit bioassay to determine the pathogenicity of a diverse geographical range of isolates of Colletotrichum scovillei showed fruit maturity, host genotype, and inoculation method all interact to affect infection and rate of lesion development. On Capsicum annuum ‘Bangchang’ fruit wounded prior to inoculation, pathogenicity was consistent regardless of fruit maturity. In contrast, without wounding there was variability in pathogenicity. On the relatively resistant host Capsicum chinense PBC932, pathogenicity was dependent on both the inoculation method and the maturity stage of the fruit. In addition, lack of correlation in pathogenicity of isolates between the two Capsicum lines indicated that there was host–isolate specialization that would make prediction of pathogenicity of isolates on host difficult. In a further study, 10 species of Colletotrichum isolated from diseased chili fruits in Asia caused anthracnose symptoms on C. annuum ‘Bangchang’ under all testing conditions, with large differences in aggressiveness. C. chinense PBC932 was generally more resistant to all the species, with smaller lesions produced in different host conditions. Colletotrichum javanense and C. scovillei were highly aggressive relative to other species, especially when inoculated on nonwounded fruit. Pathotype differences were identified within multiple isolates of C. scovillei and C. siamense, the two most frequently identified pathogenic species on chili.

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