Abstract
Black root rot disease of cotton seedlings caused by Thielavioposis basicola was first reported in New South Wales (NSW), Australia in 1990. In 2018, T. basicola was reclassified into a new genus Berkeleyomyces, accommodating two closely related species: B. basicola and B. rouxiae. However, species status of cotton-T. basicola in NSW remains unsolved. Ninety-five isolates recovered from black root rot diseased cotton seedlings sampled across NSW in 2017/18 season was subjected to morphological, multigene sequencing (ITS, MCM7, RPB2), and pathogenicity assessments for their species identification. Berkeleyomyces rouxiae was accurately identified as the causal agent of black root rot of cotton.
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Acknowledgements
We greatly thank Dr Sharon Downes from CSIRO Narrabri for assistance with molecular work, Cotton Seed Distributors Ltd. for providing cotton seeds, and the CottonInfo team for sampling assistance. We thank Dr Bernie Dominiak from NSW DPI Orange for critically reviewing and commenting for the improvement of the manuscript.
Funding
This work is Funded by Cotton Research and Development Corporation, Grant no: DAN2101, Duy Phu Le.
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Le, D.P., Gregson, A. & Jackson, R. Identification of Berkeleyomyces rouxiae causing black root rot disease on cotton seedlings in New South Wales, Australia. J Gen Plant Pathol 88, 155–159 (2022). https://doi.org/10.1007/s10327-021-01047-0
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DOI: https://doi.org/10.1007/s10327-021-01047-0