Towards an early warning system for wheat blast: epidemiological basis and model development
Year: 2021
Type: book-chapter
Abstract: Wheat blast is a relatively new disease to wheat ( Triticum aestivum L.) caused by the fungus Pyricularia oryzae Triticum pathotype – PoT (syn. Magnaporthe oryzae B.C. Couch). The disease was first reported in the state of Paraná, south region of Brazil, in 1985 ( Igarashi et al., 1986 ). During the following decades, wheat blast spread to almost all wheat regions in Brazil, and also to neighboring countries including Bolivia, Paraguay and northern Argentina ( Kohli et al., 2011 ; Perelló et al., 2015 ). The impact of this disease to wheat production can be devastating; 100% yield losses have been reported multiple times in South America ( Cruz et al., 2019 ; Gongora-Canul et al., 2020 ) and, more recently, large-scale outbreaks have occurred in Bangladesh ( Islam et al., 2016 ; Malaker et al., 2016 ). However, significantly damaging wheat blast epidemics are sporadic 624 and tend to be limited to situations when exceptionally wet and warm weather occurs prior and during the season, in regions where inoculum is not limiting, more typical of the tropics of Brazil and Bolivia ( Coelho et al., 2016 ; Fernandez et al., 2007 ; Gongora-Canul et al., 2020 ; Goulart and Paiva, 2000 ). However, the frequency of severe outbreaks has increased in the Cerrado region, central-western of Brazil, where the disease is currently a major constraint to the expansion of wheat production in this important agroecosystem ( Pasinato et al., 2018 ).
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: gold
OpenAlex ID: W4285344991