When you see utf-8 string 'Fumigación Aérea' with iso-8859-1 encoding, you will see this
So, I guess if you change browser's encoding to UTF-8 manually, you will see what you want.
So, check PHPMyAdmin's configuration. You will see "misc" menu at right side of menus, there will be "variables" pull down entry. At that entry, You will see configuration key, value pairs. What is "character set ***" values?
I am sorry for my lack of knowledge how to set these values, I am not good at mysql.