Tracking a crop disease could save millions of lives

Scientists have discovered why one of the world's most important agricultural diseases emerged, according to research published in the September issue of the Journal of General Virology. Maize streak virus (MSV) causes the main virus disease of Africa's most important food crop. By comparing the genome of the virus to those of its less harmful relatives, scientists have discovered how and why MSV became a serious pest and spread so rapidly across Africa.

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