First Report of Black Rot on Walnut Fruits Caused by <i>Neofusicoccum parvum</i> in China

Chen, X.-Y.-L.; He, Bo; Li, H.-X.; Cernava, Tomislav; Sang, Weijun; Yang, Mo; Yang, Wen‐Jia

doi:10.1094/pdis-02-19-0387-pdn

Cited by 11 publications

(3 citation statements)

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“…All these three species were tested on seedlings as well as on green fruits, demonstrating their pathogenic ability, although, based on the lesion lengths caused, they appeared to be of differing virulence. Neofusicoccum parvum was previously reported associated with walnut dieback in Spain, California, China and Korea (Chen, Morgan, Hasey et al, 2014;Chen et al, 2019;Cheon et al, 2013;Inderbitzin et al, 2010;López-Moral et al, 2019;Yu et al, 2015). In (Frisullo et al, 1994), but no molecular support was provided to present greater information within a group of taxonomically closely related species which are difficult to differentiate.…”

Section: Discussionmentioning

confidence: 99%

“…on stem and branch canker, dieback, kernel decay, canker on seedlings and fruit rot showed the presence of B. dothidea, Lasiodiplodia pseudotheobromae and N. parvum (Chen et al, 2019;Cheon et al, 2013;Li et al, 2016;Yu et al, 2015). Recently, also on the European Continent, in Spain and in the Czech Republic, symptoms of cankers, branch dieback and shoot blight were associated with several fungal species including B.…”

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confidence: 98%

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Botryosphaeriaceae species causing canker and dieback of English walnut (Juglans regia) in Italy

et al. 2020

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English walnut (Juglans regia) is an important nut crop worldwide and is currently considered emerging in Italy. Botryosphaeriaceae fungi cause symptoms including cankers, discoloration and dieback, and several species are reported across the world on walnut. In this study, symptomatic trees from an orchard in Southern Italy showing branch dieback, cankers, wood discoloration and gummosis were surveyed. Three different fungi from the Botryosphaeriaceae were consistently isolated from symptomatic tissues. Representative isolates were characterized using morphological and molecular approaches based on conidial morphology, optimum growth temperature and the comparison of DNA sequence data from the ITS, tef1‐α and tub2 loci. Three species were identified: Botryosphaeria dothidea, Neofusicoccum mediterraneum and Neofusicoccum parvum. Pathogenicity tests on detached fruits and potted plants showed that all three species were pathogenic. To our knowledge, this is the first report of these Botryosphaeriaceae species causing canker and dieback on English walnut in Italy.

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Section: Discussionmentioning

confidence: 99%

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confidence: 98%

Botryosphaeriaceae species causing canker and dieback of English walnut (Juglans regia) in Italy

et al. 2020

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“…Neofusicoccum parvum was recently identified as a causal agent of pod rot on T. cacao (Puig et al 2019), and additional information is needed regarding its biology and relative virulence. Although N. parvum is reported to cause fruit rot in strawberry (Oliveira et al 2019) as well as in walnut (Chen et al 2019), it is more commonly known as a stem pathogen, causing grapevine decline (Úrbez-Torres and Gubler 2009) and canker/dieback in Eucalyptus, 'Ohi'a, and apple (Iturritxa et al 2011;Hughes et al 2018;Rusin et al 2019). In avocado and mango, it causes disease on both the fruit and woody tissue (Zea-Bonilla et al 2007;Hui-Fang et al 2012;Molina-Gayosso et al 2012;Ismail et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Virulence tests of Neofusicoccum parvum, Lasiodiplodia theobromae, and Phytophthora palmivora on Theobroma cacao

et al. 2021

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Neofusicoccum parvum is a recently reported pathogen affecting Theobroma cacao L., and has been isolated from symptomatic pods on Oahu and Hawaii Islands. Determining infection routes and virulence are essential for assessing the impact of N. parvum on cacao production and developing effective disease management strategies. Infection routes were determined by inoculating unwounded stems and pods with six isolates of N. parvum alongside Lasiodiplodia theobromae and Phytophthora palmivora. Fifty percent of unwounded stems inoculated with P. palmivora developed lesions, but only a single lesion developed following inoculation with N. parvum (isolate H44). L. theobromae and the remaining N. parvum isolates did not induce lesion development on unwounded stems. In contrast, all N. parvum and L. theobromae isolates produced lesions on 40–100% of unwounded pods of GNV 164 and GNV 360. Low incidences of infection were observed in unwounded pods of ICS 95 (0–66.7%), SHRS 21 (0–75%), and SHRS 33 (0–20%). On wounded pods, all pathogen species produced similar size lesions, ranging from 1.90 to 7.60 cm four days after inoculation. Results from this study show that all three species can produce high rates of pod infection on some clones in the absence of wounds, but stem infection is less likely. In addition, this is the first report of L. theobromae infecting cacao pods and P. palmivora infecting stems in the absence of wounds.

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Bioprospecting for secondary metabolites of family Botryosphaeriaceae from a biotechnological perspective

Kumar

2020

New and Future Developments in Microbial Biotechnology and Bioengineering

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First Report of Black Rot on Walnut Fruits Caused by Neofusicoccum parvum in China

Cited by 11 publications

References 4 publications

Botryosphaeriaceae species causing canker and dieback of English walnut (Juglans regia) in Italy

Botryosphaeriaceae species causing canker and dieback of English walnut (Juglans regia) in Italy

Virulence tests of Neofusicoccum parvum, Lasiodiplodia theobromae, and Phytophthora palmivora on Theobroma cacao

Bioprospecting for secondary metabolites of family Botryosphaeriaceae from a biotechnological perspective

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