metarchon

metarchon

(mɪˈtɑːkɒn)
n
(Chemistry) a nontoxic substance, such as a chemical to mask pheromones, that reduces the persistence of a pest
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014