Yes, you must disclose those as per question 11.1 on the form:
"Have you ever committed any offences against the laws of Ireland or any overseas country?"
Give details of the offences, request copies of receipts. People mistakenly think that offences commited outside of Ireland or the EU cannot be discovered by the DOJ. The Department works with different agencies inside and outside of the Ireland. If they find out later about those, your citizenship application can be rejected, or if granted, the citizenship certificate will be revoked.