In collaboration with Zimbabwe's Institute for Agricultural Engineering, she tested diatomaceous earth against a common organophosphate pesticide in three of Zimbabwe's regions, and on three crops: sorghum, maize and cowpeas.

ECONOMIST: Pest control

"The International Institute of Tropical Agriculture genebank houses the world's largest collection of cowpeas, with over 15, 000 unique varieties from 88 countries around the world, " said Dr Dominique Dumet, the institute's genebank manager.

BBC: Seeds destined for the 'doomsday' vault (Image: IITA)