Kenya has with immediate effect banned the importation of maize into the country from two neighbouring countries Uganda and Tanzania. According to a letter by the acting Director-General of the Agriculture and Food Authority, Kello Harsama to Pamela Ahago, Commissioner of Customs in the Kenya Revenue Authority, this decision was decision was made after a survey conducted indicated maize from the two countries is not fit for human consumption. CNBC Africa spoke to Ken Gichinga, Chief Economist at Mentoria Economics.