The Donald Danforth Plant Science Center today announced that the Howard G. Buffett Foundation has granted more than $3 million to fund research to enhance resistance to virus infection and increase the nutritional content of sweet potato for Africa. [...] In the 1990s, a project to control the disease caused by SPFMV was initiated in a collaborative between a Kenyan research institute and Monsanto Company, with limited success. Researchers later demonstrated that the disease was caused by co-infection by SPFMV (+) SPCSV, rather than by single virus.