I was looking for this information for my two friends in agricultural economics and entomology. The first one is not covered in STEM while the second one is. Please check yourself for your degree.

Full list of Instructional Codes: http://nces.ed.gov/pubs2002/cip2000/

Match your qualification with the new rule: http://www.dhs.gov/xlibrary/assets/press_opt_ifr.pdf

I hope this helps.