Nova ferrugem do colmo do trigo em movimento

Avatar para Matt Hopkins Por Andréa Klosterman Harris|30 de maio de 2007

Ug99 has overcome many effective resistances, including those in the international germ plasm out of CIMMYT (International Maize and Wheat Improvement Centre) in Mexico City. Some resistance was found in US wheat lines, but it was not widespread. Wheat varieties resistant to stem rust disease containing the Sr31 gene were beaten by Ug99; breeders then located the Sr24 gene, which was effective until Ug99 mutated in 2006 and was able to overcome both Sr31 and Sr24. Additionally, fungicides have had variable results; wheat fields sprayed with Folicur three times were still wiped out due to the disease’s quick and early development.

Com base nos padrões climáticos constantes do leste da África, a ferrugem do caule deve se deslocar para o norte, para a Síria e a Turquia, e depois para a Europa. Pode se espalhar para o leste, para a China e a Rússia, com uma disseminação natural para a América do Norte e do Sul até 2010.

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