She said though the issue raised by Mallikarjun Kharge and N K Premachandran are important, they are not so urgent to disrupt the business of the day.
She said members were free to raise the issue through other rules and assured them that she would allow it in Zero Hour.
Kharge said he had given the notice on Friday but the matter could not be taken up.
He said it is an important issue as a serious situation has arisen out of the notification hiking excise on diesel and petrol.
Several members from the opposition said it could affect the common man and farmers.