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 polyploidy in plants as an alternative to colchicine.

Oryzalin's mode of action is inhibition of microtubule assembly, so its HRAC classification is Group D (Australia), Group K1 (global), or Group 3 (numeric).

Roughly was used in the US in 2019, down from about in 2010, and in 1995 (by USGS estimates).

Research

Oryzalin has been studied for its potential use as an antiparasitic agent, particularly against Leishmania.

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