The role of conidia in the dispersal of Ascochyta rabiei

Article

Khaliq, Ihsanul, Fanning, Joshua, Melloy, Paul, Galloway, Jean, Moore, Kevin, Burrell, Daniel and Sparks, Adam H.. 2020. "The role of conidia in the dispersal of Ascochyta rabiei." European Journal of Plant Pathology. 158 (4), pp. 911-924. https://doi.org/10.1007/s10658-020-02126-2
Article Title

The role of conidia in the dispersal of Ascochyta rabiei

ERA Journal ID2587
Article CategoryArticle
AuthorsKhaliq, Ihsanul (Author), Fanning, Joshua (Author), Melloy, Paul (Author), Galloway, Jean (Author), Moore, Kevin (Author), Burrell, Daniel (Author) and Sparks, Adam H. (Author)
Journal TitleEuropean Journal of Plant Pathology
Journal Citation158 (4), pp. 911-924
Number of Pages14
Year2020
PublisherSpringer
Place of PublicationNetherlands
ISSN0929-1873
1573-8469
Digital Object Identifier (DOI)https://doi.org/10.1007/s10658-020-02126-2
Web Address (URL)https://link.springer.com/article/10.1007%2Fs10658-020-02126-2
Abstract

Ascochyta rabiei asexual spores (conidia) were assumed to spread over short distances (~10 m) in a combination of rain and strong wind. The potential distance of conidial spread was investigated in three rainfall and three sprinkler irrigation events. Chickpea trap plants were distributed at the distances of 0, 10, 25, 50 and 75 m from infected chickpea plots before scheduled irrigation and forecast rainfall events. Trap plants were transferred to a controlled temperature room (20 °C) for 48 h (100% humidity) after being exposed in the field for 2–6 days for rainfall events, and for 1 day for irrigation events. After a 48 h incubation period, trap plants were transferred to a glasshouse (20 °C) to allow lesion development. Lesions on all plant parts were counted after 2 weeks, which gave an estimate of the number of conidia released and the distance travelled. Trap plants at all distances were infected in all sprinkler irrigation and rainfall events. The highest number of lesions on trap plants were recorded closest to the infected plots –the numbers decreased as the distance from the infected plots increased. There was a significant (p < 0.05) relationship between the amount of rainfall and the number of lesions recorded. A generalised additive model was developed that efficiently described spatial patterns of conidial spread. With further development, the model can be used to predict the spread of A. rabiei. This is the first systematic study to show that conidia distribute A. rabiei over longer distances than previously reported.

KeywordsAscochyta blight; Chickpea; Conidial spread; Epidemiology; Sprinkler irrigation; Wind-driven rain
ANZSRC Field of Research 2020300409. Crop and pasture protection (incl. pests, diseases and weeds)
Byline AffiliationsCentre for Crop Health
Agriculture Victoria
Department of Primary Industries and Regional Development, Western Australia
Department of Primary Industries, New South Wales
Institution of OriginUniversity of Southern Queensland
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Sparks, Adam H., Forbes, Gregory A., Hijmans, Robert J. and Garrett, Karen A.. 2014. "Climate change may have limited effect on global risk of potato late blight." Global Change Biology. 20 (12), pp. 3621-3631. https://doi.org/10.1111/gcb.12587
A review on crop losses, epidemiology and disease management of rice brown spot to identify research priorities and knowledge gaps
Barnwal, M. K., Kotasthane, A., Magculia, N., Mukherjee, P. K., Savary, S., Sharma, A. K., Singh, H. B., Singh, U. S., Sparks, A. H., Variar, M. and Zaidi, N.. 2013. "A review on crop losses, epidemiology and disease management of rice brown spot to identify research priorities and knowledge gaps." European Journal of Plant Pathology. 136 (3), pp. 443-457. https://doi.org/10.1007/s10658-013-0195-6
Taking transgenic rice drought screening to the field
Gaudin, Amelie C. M., Henry, Amelia, Sparks, Adam H. and Slamet-Loedin, Inez H.. 2013. "Taking transgenic rice drought screening to the field." Journal of Experimental Botany. 64 (1), pp. 109-117. https://doi.org/10.1093/jxb/ers313
An economic assessment of the impact of mango pulp weevil on the agricultural sector of Palawan, Philippines
McKinley, Justin D., Sparks, Adam H., Pede, Valerien O. and Duff, Bart. 2012. "An economic assessment of the impact of mango pulp weevil on the agricultural sector of Palawan, Philippines." The Philippine Agricultural Scientist: an international journal of tropical agriculture and related sciences. 95 (3), pp. 286-292.
Complexity in climate-change impacts: an analytical framework for effects mediated by plant disease
Garrett, K. A., Forbes, G. A., Savary, S., Skelsey, P., Sparks, A. H., Valdivia, C., van Bruggen, A. H. C., Willocquet, L., Djurle, A., Duveiller, E., Eckersten, H., Pande, S., Vera Cruz, C. and Yuen, J.. 2011. "Complexity in climate-change impacts: an analytical framework for effects mediated by plant disease." Plant Pathology. 60 (1), pp. 15-30. https://doi.org/10.1111/j.1365-3059.2010.02409.x
International agricultural research tackling the effects of global and climate changes on plant diseases in the developing world
Savary, Serge, Nelson, Andrew, Sparks, Adam H, Willocquet, Laetitia, Duveiller, Etienne, Mahaku, George, Forbes, Greg, Garrett, Karen A., Hodson, David, Padgham, Jon, Pande, Suresh, Sharma, Mamta, Yuen, Jonathan and Djurle, Annika. 2011. "International agricultural research tackling the effects of global and climate changes on plant diseases in the developing world." Plant Disease: an international journal of applied plant pathology. 95 (10), pp. 1204-1216. https://doi.org/10.1094/PDIS-04-11-0316
A metamodeling framework for extending the application domain of process-based ecological models
Sparks, Adam H., Forbes, Gregory A., Hijmans, Robert and Garrett, Karen A.. 2011. "A metamodeling framework for extending the application domain of process-based ecological models." Ecosphere. 2 (8). https://doi.org/10.1890/ES11-00128.1
Highly heritable resistance to root-lesion nematode (Pratylenchus thornei) in Australian chickpea germplasm observed using an optimised glasshouse method and multi-environment trial analysis
Rodda, M. S., Hobson, K. B., Forknall, C. R., Daniel, R. P., Fanning, J. P., Pounsett, D. D., Simpfendorfer, S., Moore, K. J., Owen, K. J., Sheedy, J. G., Thompson, J. P., Hollaway, G. J. and Slater, A. T.. 2016. "Highly heritable resistance to root-lesion nematode (Pratylenchus thornei) in Australian chickpea germplasm observed using an optimised glasshouse method and multi-environment trial analysis." Australasian Plant Pathology. 45 (3), pp. 309-319. https://doi.org/10.1007/s13313-016-0409-4
Chickpeas! Varietal performance, wet feet and root rot, virus and salinity effects in 2012, Ascochyta management, seed quality, issues in central Queensland and effects of desiccating too early with glyphosate on seed germination
Moore, Kevin, Ryley, Mal and Sharman, Murray. 2013. "Chickpeas! Varietal performance, wet feet and root rot, virus and salinity effects in 2012, Ascochyta management, seed quality, issues in central Queensland and effects of desiccating too early with glyphosate on seed germination." 2013 GRDC Grains Research Update, Northern Region. Goondiwindi, Australia 05 - 06 Mar 2013 Canberra, Australia.
Response of chickpea genotype to Phytophthora root rot, PRR (Phytophthora medicaginis)
Moore, Kevin, Ryley, Malcolm, Hobson, Kristy, Harden, Steve, Martin, William, King, Kris, Nash, Paul and Chiplin, Gail. 2013. "Response of chickpea genotype to Phytophthora root rot, PRR (Phytophthora medicaginis)." Pulse Breeding Australia Inaugural Conference (PBA 2013): Expanding Horizons. Adelaide, Australia 20 - 23 Oct 2013