The most recent ban was in March when the government prohibited the importation of maize from Tanzania and Uganda on claims that it had aflatoxin.
The Agriculture and Food Authority (AFA) said surveillance and tests done on maize from the two countries had shown that most of it had unacceptable levels of aflatoxin.
And maize is not the only product that Kenya has banned from the two countries. Others include cooking gas, raw sugar cane, sugar, eggs, dairy and meat products.
The MPs noted that Uganda had always been hospitable to Kenyan businesses and accepted Kenyan imports and wondered whether it was time to start repaying Kenya in kind.