(Bloomberg) -- In the village of Ndodo, 25 miles south of the Malawian capital Lilongwe, farmers gather in the shade of an acacia tree as a voice over a smartphone tells them how to get rid of a weevil that’s destroying their sweet potato crops.Most Read from BloombergSouthwest Plane Plunged Within 400 Feet of Ocean Near HawaiiWells Fargo Fires Over a Dozen for ‘Simulation of Keyboard Activity’Yes, Everyone Really Is Sick a Lot More Often After CovidBump Stock Ban Tossed Out by Supreme Court in