Production vulnerability to wheat blast disease under climate change

Diego N. L. Pequeno (), Thiago B. Ferreira, José M. C. Fernandes, Pawan K. Singh, Willingthon Pavan, Kai Sonder, Richard Robertson, Timothy J. Krupnik, Olaf Erenstein and Senthold Asseng ()
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Diego N. L. Pequeno: International Maize and Wheat Improvement Center
Thiago B. Ferreira: International Maize and Wheat Improvement Center
José M. C. Fernandes: Brazilian Agricultural Research Corporation, Embrapa Trigo
Pawan K. Singh: International Maize and Wheat Improvement Center
Willingthon Pavan: University of Florida
Kai Sonder: International Maize and Wheat Improvement Center
Timothy J. Krupnik: International Maize and Wheat Improvement Center
Senthold Asseng: HEF World Agricultural Systems Center

Nature Climate Change, 2024, vol. 14, issue 2, 178-183

Abstract: Abstract Wheat blast is a devastating disease caused by the fungal pathogen Magnaporthe oryzae pathotype Triticum that has spread to both neighbouring and distant countries following its emergence in Brazil in the 1980s. Under climate change conditions, wheat blast is predicted to spread primarily in tropical regions. Here we coupled a wheat crop simulation model with a newly developed wheat blast model, to provide quantitative global estimates of wheat blast vulnerability under current and future climates. Under current climatic conditions, 6.4 million hectares of arable land is potentially vulnerable to wheat blast. A more humid and warmer climate in the future (Representative Concentration Pathway 8.5) is likely to increase the area suitable for wheat blast infection, particularly in the Southern Hemisphere, and reduce global wheat production by 69 million tons per year (13% decrease) by mid-century. Impacts of climate change could be further exacerbated and food security problems increased.

Date: 2024
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DOI: 10.1038/s41558-023-01902-2

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