International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
HRAC GROUP 22 (LEGACY D) RESISTANT HARDGRASS
(Sclerochloa dura)

PS I Electron Diversion HRAC Group 22 (Legacy D)

China
INTRODUCTION HARDGRASS
Hardgrass (Sclerochloa dura) is a monocot weed in the Poaceae 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 NameHardgrass
SpeciesSclerochloa dura
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 Hardgrass biotype with this Hardgrass 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 Hardgrass 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 Hardgrass 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 Hardgrass Globally
(Sclerochloa dura)
Herbicide Resistant Hardgrass Globally
(Sclerochloa dura)
Drag a column header and drop it here to group by that column
Herbicide Resistant Hardgrass Globally
(Sclerochloa dura)
#CountryFirstYearSituationActive IngredientsSite of Action
1 ChinaChina 2011 Unspecified paraquat 9 PS I Electron Diversion ( HRAC Group 22 (Legacy D)
 		283Sclerochloa duraHardgrass5687
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