Wiktionary
oryzalin
n. A selective herbicide used to control annual grasses etc. in food crops
Wikipedia
Oryzalin
Oryzalin is an herbicide of the dinitroaniline class. It acts through the disruption (depolymerization) of microtubules, thus blocking anisotropic growth of plant cells. It can also be used to induce ploidity as an alternative to colchicine