You are not the judge to decide your wife's allegations, mentioned in her Application for Divorce? In every Suit/Petition/Application aggrieved party makes allegations and it is subject to adjudication. How can you file perjury on this basis.?
You have to prove it through proper evidence that perjury had been done.
The Indian Penal Code (IPC) under Section 191 defines perjury as giving false evidence and by interpretation it includes the statements retracted later as the person is presumed to have given a false statement earlier or later, when the statement is retracted. Under section 191 of IPC, an affidavit is evidence and a person swearing to a false affidavit is guilty of perjury punishable under Section 193 IPC which prescribes the period of punishment as seven years imprisonment. However, action against making a false statement should be initiated during the trial itself, and not at the end of it which may take a long time. That may be a deterrent against persons who intentionally mislead the court or make false statements under oath or file tainted affidavits much against the public good.