First report of powdery mildew caused by Podosphaera xanthii on Ageratum conyzoides, in Indonesia

Authors

  • Siska Arie Santy Siahaan Department of Agrotechnology, Faculty of Agriculture, Universitas Simalungun. Jalan Sisingamangaraja Barat, Kel. Bah Kapul, Kota Pematangsiantar, 21142, North Sumatra, Indonesia
  • Jamjan Meeboon Institute of Vegetable and Floriculture Science, National Agriculture and Food Research Organization (NARO), 360 Kusawa, Ano, Tsu, Mie 514-2392, Japan
  • Iman Hidayat Research Center for Biology, Indonesian Institute of Sciences-LIPI, Jl. Raya Jakarta-Bogor KM 46, Cibinong 16911, West Java, Indonesia
  • Kartini Kramadibrata Indonesian Mycological Society (MIKOINA), Bogor Branch, Bogor, West Java, Indonesia
  • Arvita Netti Sihaloho Department of Agrotechnology, Faculty of Agriculture, Universitas Simalungun. Jalan Sisingamangaraja Barat, Kel. Bah Kapul, Kota Pematangsiantar, 21142, North Sumatra, Indonesia
  • Ika Rosenta Purba Department of Urban and Regional Planning, Postgraduate Program, Universitas Simalungun. Jalan Sisingamangaraja Barat, Kel. Bah Kapul, Kota Pematangsiantar, 21142, North Sumatra, Indonesia

DOI:

https://doi.org/10.51601/ijse.v6i1.415

Abstract

Powdery mildew is one of the most common and important fungal diseases and may cause huge economic losses to crop yields worldwide. During survey of powdery mildews in 2011 and 2013, six samples of Ageratum conyzoides were collected from different regions in Indonesia, i.e. Bali, South Sumatera and West Java provinces. Anamorphic features revealed that the fungus belongs to the genus Podosphaera. Two sets of sequences of both ITS rRNA and 28S regions were obtained from the six samples. Phylogenetic analyses, including maximum parsimony (MP) and maximum likelihood (ML) were executed using MEGA7. The strength of internal branches of the resulting trees were tested with bootstrap analysis. Tree scores, including tree length, CI, RI and RC were also calculated. The phylogenetic analysis confirmed that the fungus belongs to the genus Podosphaera, forming a clade with the sequences from Podosphaera xanthii. This is the first report of powdery mildews on Ageratum conyzoides from Indonesia.

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Author Biography

Ika Rosenta Purba, Department of Urban and Regional Planning, Postgraduate Program, Universitas Simalungun. Jalan Sisingamangaraja Barat, Kel. Bah Kapul, Kota Pematangsiantar, 21142, North Sumatra, Indonesia

Powdery mildew is one of the most common and important fungal diseases and may cause huge economic losses to crop yields worldwide. During survey of powdery mildews in 2011 and 2013, six samples of Ageratum conyzoides were collected from different regions in Indonesia, i.e. Bali, South Sumatera and West Java provinces. Anamorphic features revealed that the fungus belongs to the genus Podosphaera. Two sets of sequences of both ITS rRNA and 28S regions were obtained from the six samples. Phylogenetic analyses, including maximum parsimony (MP) and maximum likelihood (ML) were executed using MEGA7. The strength of internal branches of the resulting trees were tested with bootstrap analysis. Tree scores, including tree length, CI, RI and RC were also calculated. The phylogenetic analysis confirmed that the fungus belongs to the genus Podosphaera, forming a clade with the sequences from Podosphaera xanthii. This is the first report of powdery mildews on Ageratum conyzoides from Indonesia.

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Published

2026-02-17

How to Cite

Arie Santy Siahaan, S., Meeboon, J., Hidayat, I., Kramadibrata, K., Netti Sihaloho, A., & Rosenta Purba, I. (2026). First report of powdery mildew caused by Podosphaera xanthii on Ageratum conyzoides, in Indonesia. International Journal of Science and Environment (IJSE), 6(1), 849–855. https://doi.org/10.51601/ijse.v6i1.415