First Report of Soft Rot on <i>Dendrobium officinale</i> Caused by <i>Epicoccum sorghinum</i> in China

Xiao, Caiyun; Li, Rongyu; Song, Xingchen; Tian, Xujun; Zhao, Qianying

doi:10.1094/pdis-04-21-0866-pdn

Cited by 7 publications

(2 citation statements)

References 5 publications

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“…F. oxysporum causes Fusarium wilt disease [20]. Ring rot disease caused by Myrothecium roridum has appeared on leaves and stems [21], and soft rot disease caused by F. oxysporum and Epicoccum can afflict stems and roots [22,23].…”

Section: Introductionmentioning

confidence: 99%

Characterization and Control of Dendrobium officinale Bud Blight Disease

et al. 2023

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Dendrobium officinale is an important traditional Chinese medicine (TCM). A disease causing bud blight in D. officinale appeared in 2021 in Yueqing city, Zhejiang Province, China. In this paper, 127 isolates were obtained from 61 plants. The isolates were grouped into 13 groups based on collected areas and morphological observations. Four loci (ITS, LSU, tub2 and rpb2) of 13 representative isolates were sequenced and the isolates were identified by constructing phylogenetic trees with the multi-locus sequence analysis (MLSA) method. We found the disease to be associated with three strains: Ectophoma multirostrata, Alternaria arborescens and Stagonosporopsis pogostemonis, with isolates frequencies of 71.6%, 21.3% and 7.1%, respectively. All three strains are pathogenic to D. officinale. A. arborescens and S. pogostemonis isolated from D. officinale were reported for the first time. Iprodione (50%), 33.5% oxine-copper and Meitian (containing 75 g/L pydiflumetofen and 125 g/L difenoconazole) were chosen to control the dominant pathogen E. multirostrata, with an EC50 value of 2.10, 1.78 and 0.09 mg/L, respectively. All three fungicides exhibited an effective inhibition of activities to the growth of the dominant pathogen E. multirostrata on potato dextrose agar (PDA) plates, with Meitian showing the strongest inhibitory effect. We further found that Meitian can effectively control D. officinale bud blight disease in pot trial.

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Section: Introductionmentioning

confidence: 99%

Characterization and Control of Dendrobium officinale Bud Blight Disease

et al. 2023

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“…Currently, D. officinale production is seriously threatened by a number of fungal genera such as Alternaria alternata, Ceratobasidium sp. (species), Cladosporium cladosporioides, Colletotorichum gloeosporioides, C. fructicola, Epicoccum sorghinum, Fusarium equiseti, F. kyushuense, F. oxysporum, Neopestalotiopsis clavispora, Phoma multirostrata, and Sclerotium delphinii [6][7][8][9][10][11][12]. Among them, F. equiseti causes the dieback disease, which was initially identified in Fujian Province, China [8].…”

Section: Introductionmentioning

confidence: 99%

Fusarium spp. Associated with Dendrobium officinale Dieback Disease in China

Mirghasempour

Michailides

Chen

et al. 2022

JoF

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A rare plant species of the Orchidaceae family, Dendrobium officinale is considered among the top ten Chinese medicinal herbs for its polysaccharide. Since 2021, when the dieback disease of D. officinale was first reported in Yueqing City, Zhejiang Province, China, Fusarium isolates (number = 152) were obtained from 70 plants in commercial greenhouses. The disease incidence ranged from 40% to 60% in the surveyed areas. Multilocus sequence analysis (MLSA) coupled with morphological characterization revealed that the collected isolates belonged to five species (sp.), viz., Fusarium concentricum, F. fujikuroi, F. nirenbergiae, F. curvatum, and F. stilboides, with isolation frequencies of 34.6%, 22.3%, 18.4%, 13.8%, and 10.5%, respectively. Notably, at least two Fusarium species were simultaneously isolated and identified from the infected plants. Finally, the pathogenicity test results demonstrated that such species were responsible for the dieback disease of D. officinale. However, F. concentricum and F. fujikuroi were more invasive compared to the other species in this study. To the best of the authors’ knowledge, this study was the first report of F. concentricum, F. curvatum, F. fujikuroi, F. nirenbergiae, and F. stilboides causing the dieback disease of D. officinale in China and worldwide. This work provides valuable data about the diversity and pathogenicity of Fusarium populations, which will help in formulating effective strategies and policies for better control of the dieback disease.

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