Here is a site that tells what determines certification and a snippit from the site.
http://www.entsoc.org/bce/
What Are the Requirements to Become a Board Certified Entomologist?
The requirements to become a BCE are as follows: an academic degree in entomology or a related science, experience as a practicing entomologist, a passing mark on a general qualifying examination, and a passing mark on at least one specialty examination. Click here for a list of topics to study. The degree and experience requirements can be met in any of the following ways: An earned degree in entomology or related field, with the required certifiable entomological work experience: Doctoral degree and one year experience, or Masters degree and two years experience, or Bachelors degree and three years experience or..........................
or
Seven years experience
An established number of continuing education units for the three year period prior to application
Plus