Wheat blast is an important disease for warm and humid wheat production regions, caused by Magnaporthe oryzae pathotype Triticum.
The disease was first identified in the state of Paraná of Brazil in 1985, and it subsequently spread to other major wheat-producing areas of Brazil as well as several neighboring countries like Argentina, Bolivia and Paraguay. In recent years, wheat blast has been observed in Bangladesh and Zambia, threatening wheat production in Asia and Africa.
Field resistance source is mostly limited to 2NS carriers, which are being eroded by newly emerged MoT isolates, necessitating an urgent need for broadening the genetic basis of wheat blast resistance.
The changing climate (global warming and irregular rains) and the evolving tendency of the pathogen (increasing virulence, fungicide resistance and sexual recombination) can further aggravate disease incidence and severity.
CIMMYT is working on different strategies to mitigate the global threat of wheat blast, in collaboration with national agricultural research partners in Africa, Asia and Latin America.
Researchers evaluate the use of genomic selection in wheat breeding against deadly fungal disease.
Researchers point out the future of the disease, the ways to manage it and prevent it from spreading — within and across continents.
Cross-regional collaboration brings wheat blast protection to farmers in Bangladesh and Brazil.
Source: World Grain (19 Mar 2021)
Genetic analyses show that a destructive wheat blast fungus that travelled from South America to South East Asia is now established in Zambia under rain-fed conditions.
High-zinc and climate-resilient varieties poised to boost production for farmers and nutrition for consumers.
Source: SciDev.Net (3 Nov 2020)
Wheat blast is a serious threat to wheat production and can lead to yield losses of up to 100 percent.
Source: Rural 21 (9 Oct 2020)
Wheat blast poses a serious threat to rain-fed wheat production in Zambia and raises the alarm for surrounding regions and countries on the African continent with similar environmental conditions.
Genomic-wide association study evaluated samples from Bolivia and Bangladesh for blast-resistant genes.
Researchers in Zambia confirm the arrival of this devastating fungal disease to the African continent.
Looking at wheat diseases in times of the COVID-19 crisis.
Wheat blast is one of the most fearsome and intractable wheat diseases in recent decades. It spreads through infected seeds, crop residues as well as by spores that can travel long distances in the air, posing a major threat to wheat production in tropical areas.