By-elections to the 11 seats of Maharashtra Pradesh Legislative Council and one seat of Karnataka Legislative Council will be held on July 25.Announcing this today, the Election Commission said the notification for the by-polls will be issued on July 7 and the last date for filing nominations will be July 14. Polling will be held on July 25.The lone Karnataka Legislative Council seat fell vacant after the death of state Higher Education Minister V S Acharya on February 14.11 seats in Maharashtra Legilative council fell vacant following retirement of members.