The person whose lab has been doing lots of the work on response in
cockroach is Richard Karp.
you can write him at Dept. Biol. Sciences, Univ of Cincinnati,
Cincinnati OH 45221. He may know who else has corroborated what he
found.
Jeremy Creighton Ahouse
Biology and Center for Complex Systems
Brandeis University
Waltham, MA 02254-9110