(FILES) Picture taken on April 22, 2008 of a crop duster plane spraying fungicide to protect the 7,000 hectare banana plantation of Tagum Agricultural Development Co. from destructive leaf virus in Tagum in Davao del Norte province, located in the southern Philippine island of Mindanao. Farm chiefs have a narrowing chance to diversify vital crops at rising threat from drought, flood and pests brought by climate change, food researchers warned on October 3, 2011. The world’s nearly seven billion people are massively dependent on a dozen or so crops that, thanks to modern agriculture, are intensively cultivated in a tiny number of strains, they said.
AFP PHOTO/ROMEO GACAD (Photo credit should read ROMEO GACAD/AFP/Getty Images)
