Concepts, approaches, and avenues for modelling crop health and crop losses

Article

Savary, Serge, Nelson, Andrew D., Djurle, Annika, Esker, Paul D., Sparks, Adam H., Amorim, Lilian, Filho, Armamando Bergamin, Caffi, Tito, Castilla, Nancy, Garrett, Karen, McRoberts, Neil, Rossi, Vitorrio, Yuen, Jonathan and Willocquet, Laetitia. 2018. "Concepts, approaches, and avenues for modelling crop health and crop losses." European Journal of Agronomy. 100, pp. 4-18. https://doi.org/10.1016/j.eja.2018.04.003
Article Title

Concepts, approaches, and avenues for modelling crop health and crop losses

ERA Journal ID5307
Article CategoryArticle
AuthorsSavary, Serge (Author), Nelson, Andrew D. (Author), Djurle, Annika (Author), Esker, Paul D. (Author), Sparks, Adam H. (Author), Amorim, Lilian (Author), Filho, Armamando Bergamin (Author), Caffi, Tito (Author), Castilla, Nancy (Author), Garrett, Karen (Author), McRoberts, Neil (Author), Rossi, Vitorrio (Author), Yuen, Jonathan (Author) and Willocquet, Laetitia (Author)
Journal TitleEuropean Journal of Agronomy
Journal Citation100, pp. 4-18
Number of Pages15
Year2018
PublisherElsevier
Place of PublicationAmsterdam, Netherlands
ISSN1161-0301
1873-7331
Digital Object Identifier (DOI)https://doi.org/10.1016/j.eja.2018.04.003
Web Address (URL)https://www.sciencedirect.com/science/article/pii/S1161030118300832
Abstract

This article addresses the modelling of crop health and its impact on crop losses, with a special emphasis on plant diseases. Plant disease epidemiological models have many different shapes. We propose a summary of modelling structures for plant disease epidemics, which stem from the concepts of infection rate, of site, of basic infection rate corrected for removals (Rc), and of basic reproductive number (R0). Crop losses, the quantitative and qualitative impacts of diseases and pests on crop performances, can be expressed along many different dimensions. We focus on yield loss, defined as the difference between the attainable yield and the actual yield, in a production situation. The modelling of yield loss stems from the concept of damage mechanism, which can be applied to the wide range of organisms (including pathogens, weeds, arthropods, or nematodes) that may negatively affect crop growth and performances. Damage mechanisms are incorporated in crop growth models to simulate yield losses. In both fields, epidemiology and crop loss, we discuss the process of model development, including model simplification. We emphasize model simplification as a main avenue towards model genericity. This is especially relevant to enable addressing the diversity of crop pathogens and pests. We also discuss the usefulness of considering differing evaluation criteria depending on the stage of model development, and thus, depending on modelling objectives. We illustrate progress made on two global key crops where model simplification has been critical; rice and wheat. Modelling pests and diseases, and of the yield losses they cause on these two crops, lead us to propose the concept of crop health syndrome as a set of injury functions, each representing the dynamics of an injury (such as, for example, the time-course of an epidemic). Crop health in a given context can be represented by the set of such injury functions, which in turn can be used as drivers for crop loss models.

Keywordscrop health syndrome; crop loss; yield loss
ANZSRC Field of Research 2020310805. Plant pathology
300409. Crop and pasture protection (incl. pests, diseases and weeds)
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Byline AffiliationsUniversity of Toulouse, France
University of Twente, Netherlands
Swedish University of Agricultural Sciences, Sweden
University of Costa Rica, Costa Rica
Centre for Crop Health
University of Sao Paulo, Brazil
Catholic University of Sacred Heart, Italy
International Rice Research Institute, Philippines
University of Florida, United States
University of California, United States
Institution of OriginUniversity of Southern Queensland
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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