HRAC Classification System of Herbicides

The global HRAC group proposed a classification system for herbicides according to their target sites, modes of action, similarity of induced symptoms or chemical classes (Table 1.1). 

It is the most comprehensive existing classification system of herbicides globally. With the WSSA Code System and Australian Code System two similar classification systems were developed earlier for regional needs. The usage of differ- 

Modem Crop Protection Compounds. Edited by W. Kramer and U. Schirmer Copyright 2007 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim ISBN 978-3-527-31496-6 

Inhibition of 1-deoxy-o-xylulose 5-phosphate synthase (DOXP synthase) 

Triazine, triazinone, triazolinone, uracil, pyridazinone, phenyl-carbamate Urea, amide 

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