The Collaborative International Dictionary
nematocidal
nematocidal \nem`a*to*cid"al\ (n[e^]m`[a^]*t[-o]*s[imac]d"al), a. Having the property of killing nematodes; lethal to nematodes. [Also spelled nematicidal.]
Wiktionary
nematocidal
a. Acting as a nematocide; fatal to nematodes. alt. Acting as a nematocide; fatal to nematodes.