Cheaper Nigerian onions may once again be heading to Ghana after a dispute between traders was resolved last month. But the row has exposed a wider problem for West Africa's growing free trade area: what happens when the free movement of goods puts pressure on local producers?
Ghana is a crucial market for Nigeria's onion industry, importing nearly 100,000 tonnes every year. When hundreds of tonnes of Nigerian onions were seized at Kotoka market in Accra earlier this year, tensions rose quickly.
