INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

HRAC GROUP 22 (LEGACY D) RESISTANT ASIAN MAZUS
(Mazus fauriei)

PS I Electron Diversion HRAC Group 22 (Legacy D)

China
INTRODUCTION ASIAN MAZUS
Asian Mazus (Mazus fauriei) is a dicot weed in the Scrophulariaceae family.  In China this weed first evolved resistance to Group 22 (Legacy D) herbicides in 2011 and infests Unspecified.   Group 22 (Legacy D) herbicides are known as PS I Electron Diversion (PSI Electron Diversion ).  Research has shown that these particular biotypes are resistant to paraquat and they may be cross-resistant to other Group 22 (Legacy D) herbicides.

The 'Group' letters/numbers that you see throughout this web site refer to the classification of herbicides by their site of action. To see a full list of herbicides and HRAC herbicide classifications click here.

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QUIK STATS (last updated Feb 09, 2013 )

Common NameAsian Mazus
SpeciesMazus fauriei
GroupPS I Electron Diversion HRAC Group 22 (Legacy D)
Herbicidesparaquat
LocationChina
Year2011
Situation(s)Unspecified
Contributors - (Alphabetically)Tao Jin, and Xuegang Peng 
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ACADEMIC ASPECTS

Confirmation Tests

Field, and Greenhouse trials comparing a known susceptible Asian Mazus biotype with this Asian Mazus biotype have been used to confirm resistance. For further information on the tests conducted please contact the local weed scientists that provided this information.
 
Genetics

Genetic studies on HRAC Group 22 resistant Asian Mazus have not been reported to the site.  There may be a note below or an article discussing the genetics of this biotype in the Fact Sheets and Other Literature
 
Mechanism of Resistance

The mechanism of resistance for this biotype is either unknown or has not been entered in the database.  If you know anything about the mechanism of resistance for this biotype then please update the database.
 
Relative Fitness

There is no record of differences in fitness or competitiveness of these resistant biotypes when compared to that of normal susceptible biotypes.  If you have any information pertaining to the fitness of Group 22 (Legacy D) resistant Asian Mazus from China please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

TAO JIN
Shandong Agricultural University
College Of Plant Protection
Daizong Road 61#
Tai'an, 271018
China
Email Tao Jin
XUEGANG PENG
Research Associate
Qingdao kingagroot Ltd.
Research institute of maligant weeds
Qingdao
Daizong Road 61#
Tai'an, 271018
China
Email Xuegang Peng

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in China have been instrumental in providing you this information. Particular thanks is given to Tao Jin, and Xuegang Peng for providing detailed information.
Herbicide Resistant Asian Mazus Globally
(Mazus fauriei)
Herbicide Resistant Asian Mazus Globally
(Mazus fauriei)
Drag a column header and drop it here to group by that column
Herbicide Resistant Asian Mazus Globally
(Mazus fauriei)
#CountryFirstYearSituationActive IngredientsSite of Action
1 ChinaChina 2011 Unspecified paraquat 9 PS I Electron Diversion ( HRAC Group 22 (Legacy D)
 		281Mazus faurieiAsian Mazus 5686
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HRAC Global Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Saturday, October 3, 2026.  Available at  www.weedscience.org

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