[chris (OP)]

There seems to be a bit of confusion in some quarters about how cockroaches reproduce - do they mate sexually, or are they asexual, or both.

I found this reference: https://zoologicalletters.biomedcentral.com/articles/10.1186/s40851-017-0063-x

Their approach is actually extremely interesting 

[alancalverd]

 

.......virgin females housed with genitalia-ablated males.....

A sad comment on the state of Japanese television, I feel. For gawdsake, Ko Katoh, Masazumi Iwasaki, Shouhei Hosono, Atsushi Yoritsune, Masanori Ochiai, Makoto Mizunami and Hiroshi Nishino, try getting out occasionally instead of castrating cockroaches! Or even reading about it, Chris.