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Isolation, pathogenicity, and safety evaluation of a pathogen from buffalobur (Solanum rostratum) in China

Published online by Cambridge University Press:  29 October 2024

Wenfeng Yan Open the ORCID record for Wenfeng Yan [Opens in a new window] ,
Wanting Zheng  and
Yanan Zheng Open the ORCID record for Yanan Zheng [Opens in a new window]
Wenfeng Yan
Affiliation:
Postgraduate, Shenyang Agricultural University, College of Forestry, Shenyang, China
Wanting Zheng
Affiliation:
Postgraduate, Shenyang Agricultural University, College of Forestry, Shenyang, China
Yanan Zheng*
Affiliation:
Professor, Liaoning University, School of Environment, Shenyang, China
*
Corresponding author: Yanan Zheng; E-mail: [email protected]
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Abstract

Buffalobur (Solanum rostratum Dunal) is an invasive weed in China, and identifying its pathogens is crucial for developing effective biological control measures. In this study, leaf samples from S. rostratum showing typical disease symptoms were collected in Liaoning and Jilin provinces, China. The isolated fungal pathogens were identified based on their morphological characteristics and by using molecular biology techniques. Pathogenicity was assessed by artificially inoculating spore suspensions from the fungal pathogen onto the seeds, isolated leaves, and plants of S. rostratum. The safety of the fungal pathogens for eight other plant species was also evaluated. We then identified the following five fungal pathogens causing disease in S. rostratum in Liaoning and Jilin provinces: Alternaria alternata, Epicoccum sorghinum, Fusarium equiseti, Curvularia hawaiiensis, and Nigrospora oryzae. These fungal pathogens exhibited pathogenicity, with N. oryzae exhibiting the strongest pathogenicity and highest safety. Nigrospora oryzae demonstrated the highest inhibition rate against the radicle germination length of S. rostratum and showed robust pathogenicity toward both isolated leaves and plants. Notably, despite inducing mild reactions in corn (Zea mays L.), grain sorghum [Sorghum bicolor (L.) Moench], rice (Oryza sativa L)., and tomato (Solanum lycopersicum L.), N. oryzae did not have any detrimental effect on the growth of these plants.

Keywords

Biological controlfungal pathogeninvasive weed
Type
Research Article
Information
Weed Science , Volume 72 , Issue 6 , November 2024 , pp. 723 - 731
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of Weed Science Society of America

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