"Ramaphosa’s statement that the “boers” will return to rule [SA] if people don’t vote for [ANC] is a shameful disregard to our constitutional democracy and it underestimates the intelligence of South Africans," he said in a statement.
Lekota accused ANC leaders of being the ones advancing laws similar to the apartheid era, with legislation to protect state secrets and national key-points.
"It is irresponsible of Ramaphosa to agitate racial hatred amongst the people of our country in pursuit of votes. We never expected such disregard for the Constitution...by the very man who contributed in writing that Constitution," the Congress of the People leader said.
The Star reported on Monday that Ramaphosa had urged Limpopo residents to vote or the "boers" would take back power.
"If you don't vote, the boers will come back to control us," Ramaphosa apparently said in Seshego.
He was speaking to disgruntled resident Johanna Phala, 49, who had vowed not to vote in next year's elections because the ANC had disappointed her.
The unemployed single mother of three blamed the high unemployment rate on the ANC and said she had lost hope in the party.
Ramaphosa asked her to reconsider her anger towards the ANC-led government.
He was in Seshego, the hometown of Economic Freedom Fighters leader Julius Malema, to drum up party support.
"If all South Africans don't vote, we will regress. The boers will come back to control us," he was quoted as saying.
‘Nothing to offer but fear’
Lekota said if Ramaphosa's statements were the final card which the party could play, to pit black and white against one another, they had exposed themselves as bankrupt contenders with nothing else to offer than fear.
Earlier the Democratic Alliance said the statements showed how much he was stuck in the dark ages.
"The ANC is panicking, which is why even people like Cyril Ramaphosa are using the race card," DA spokesperson Mmusi Maimane said in a statement.