How do I delete an album made by FarmVille on Facebook?
Go to the Photos > Albums then click on the name of the album you want to delete. Click again on the wheel next to Add Photos, Edit, Tag and select Delete Album. Confirm the operation and the album will be deleted.
You can delete all the data added to your facebook account by Farmville by the following steps :
1)Login to your account
2)Go to settings->Apps
3)Click on the Farmville and turn it off
4)The facebook will prompt for deletion of entire data by the app.
5)Tick on the check box and click ok.