Toxicological Hazards of Herbicides Bromoxynil and Ioxynil

Page: 141

P. Janů and P. Lovecká

Department of Biochemistry and Microbiology, Institute of Chemical Technology, Prague


The title herbicides are selective post-emergent contact herbicides currently widely used in the EU and USA to control broad-leaved weeds especially in crops. They are typical inhibitors of photosynthesis acting simultaneously as uncouplers of oxidative phosphorylation. The review briefly discusses their physical and chemical pro¬perties, mode of action, degradation and toxicity. Bromoxynil and Ioxynil are of low-to-moderate toxicity for all the tested species, with no in vivo genotoxicity. Their main metabolites in microbial degradation are the corresponding acids and amides, which are supposedly less toxic.


Full text (PDF)