roaches

I just started a package this spring. April 11th to be exact. Last week May 4 I put a second medium box on. The bottom 8.5 frames were full. And I thought that some new bees would be emerging this week. But then on May 9 I noticed roaches in the hive. Should I have not put a second body on...

Good afternoon all. I am a teacher who has two hives going at our school and it was going great until the end of this summer. We installed one hive two years ago and it made it through its first winter and then this fall we lost the hive. I don't think it was Foulbrood but a bad case of mites...