NAIROBI (Reuters) - Agricultural scientists unveiled a cheap kit on Thursday to let African farmers test crops for a deadly poison that makes them unfit to eat and costs the continent millions of dollars in lost exports.Aflatoxin, a toxic chemical produced by a fungus, develops on maize, groundnuts, sorghum and cassava during hot weather and droughts. In large quantities it can cause cancer in humans, and it can also be fatal for animals.
