seeds.rb utf-8? And how to fill table without model?

I've got some problems with my seeds.rb file in my ruby on rails application.

Wen I prefill the database with the seeds.rb file I got this error when I start my application:

incompatible character encodings: UTF-8 and ASCII-8BIT

But the seeds.rb file is utf8 ... When I preffil with phpmyadmin all works fine.

Second Problem is how can I prefill a table which dosn't has a model?