Referring to certain comments made by Rao, Lakshmaiah said the TRS chief talked about development of Telangana now, but had not done anything substantial for the region in the last 30 years of his political career.
"He has been in politics for the last 30 years. He has been MLA, minister, Deputy Speaker (of AP Assembly), MP and Union minister, but has he got any new proposal done in his native district (Medak)?" Lakshmaiah told reporters.
The TRS president had also hit out at Lakshmaiah alleging that he had done injustice to Telangana despite being a minister in the Congress governments led by Y S Rajasekhara Reddy and N Kiran Kumar Reddy.
Rao had earlier ruled out a merger or an electoral alliance with Congress for the general and Legislative Assembly elections in Telangana.