from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Acting as a piscicide; fatal to fish.
Sorry, no etymologies found.
But, as luck would have it, Victor ripped off his sandals and socks, I know, sandals and socks, what can I do with him? and tore into the atrium and ran through the water scaring all the other fish and grabbed the piscicidal koi and placed him back in the water and he swam away!
RUPPEL, E.G. and BARNES, D.K. (1972) Tephrosia vogelii: a source of rotenoids for insecticidal and piscicidal use.