Ray blight of pyrethrum in Australia: a review of the current status and future opportunities
Article
Article Title | Ray blight of pyrethrum in Australia: a review of the current status and future opportunities |
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ERA Journal ID | 2652 |
Article Category | Article |
Authors | Bhuiyan, M. A. H. B. (Author), Vaghefi, N. (Author) and Taylor, P. W. J. (Author) |
Journal Title | Plant Pathology |
Journal Citation | 68 (4), pp. 620-627 |
Number of Pages | 8 |
Year | 2019 |
Publisher | John Wiley & Sons |
Place of Publication | United Kingdom |
ISSN | 0032-0862 |
1365-3059 | |
Digital Object Identifier (DOI) | https://doi.org/10.1111/ppa.13000 |
Abstract | Ray blight caused by Stagonosporopsis tanaceti is one of the most important diseases of pyrethrum (Tanacetum cinerariifolium), a perennial herbaceous plant cultivated for the extraction of insecticidal pyrethrins in Australia. The disease is responsible for complete yield loss in severe outbreaks. Infected seed is considered as the principal source of S. tanaceti. Infection hyphae remain only in the seed coat and not in the embryo, resulting in pre- and post-emergence death of seedlings and latent infection. Therefore, quantification of the level of infection by S. tanaceti within seed using a qPCR assay is important for efficient management of the disease. Stagonosporopsis tanaceti completes its life cycle within 12 days after leaf infection through production of pycnidia and can infect every tissue of the pyrethrum plant except the vascular and root tissues. Ray blight epidemics occur in pyrethrum fields through splash dispersal of pycnidiospores between adjacent plants. Besides steam sterilization, thiabendazole/thiram and fludioxonil are effective seed-treating chemicals in controlling S. tanaceti before planting begins. Ray blight is currently managed in the field through the foliar application of strobilurin fungicides in the first 1–2 years of crop establishment. Later on, difenoconazole and multisite specific fungicides in the next 2–3 years during early spring successfully reduce ray blight infestation. Avoiding development of resistance to fungicides will require more sustainable management of ray blight including the development and deployment of resistant cultivars. |
Keywords | disease control; ray blight; Stagonosporopsis tanaceti; Tanacetum cinerariifolium |
ANZSRC Field of Research 2020 | 310805. Plant pathology |
Public Notes | © 2019 British Society for Plant Pathology. Accepted version deposited in accordance with the copyright policy of the publisher. |
Byline Affiliations | Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh |
Centre for Crop Health | |
University of Melbourne | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q51q7/ray-blight-of-pyrethrum-in-australia-a-review-of-the-current-status-and-future-opportunities
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