HRAC GROUP 1 (LEGACY A) RESISTANT KENG STIFFGRASS
(Sclerochloa kengiana)

Inhibition of Acetyl CoA Carboxylase HRAC Group 1 (Legacy A)

China, Jiangsu and Shandong Province

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INTRODUCTION KENG STIFFGRASS Keng Stiffgrass (Sclerochloa kengiana) is a monocot weed in the Poaceae family.  In China this weed first evolved resistance to Group 1 (Legacy A) herbicides in 2010 and infests Winter wheat.   Group 1 (Legacy A) herbicides are known as Inhibition of Acetyl CoA Carboxylase (Inhibition of Acetyl CoA Carboxylase ).  Research has shown that these particular biotypes are resistant to clodinafop-propargyl, and fenoxaprop-ethyl and they may be cross-resistant to other Group 1 (Legacy A) 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.

QUIK STATS (last updated Dec 17, 2013 ) Common Name Keng Stiffgrass Species Sclerochloa kengiana Group Inhibition of Acetyl CoA Carboxylase HRAC Group 1 (Legacy A) Herbicides clodinafop-propargyl, and fenoxaprop-ethyl Location China, Jiangsu and Shandong Province Year 2010 Situation(s) Winter wheat Contributors - (Alphabetically) Jinxin Wang, and Guohui Yuan  Edit this Case  |  Add New Case of Resistance  |  Add Note

ACADEMIC ASPECTS Confirmation Tests Field, Greenhouse, and Laboratory trials comparing a known susceptible Keng Stiffgrass biotype with this Keng Stiffgrass 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 1 resistant Keng Stiffgrass indicate that the inheritance is determined by a one gene, dominant trait.  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 Studies on the mechanism of resistance of Group 1 (Legacy A) resistant Keng Stiffgrass from China indicate that resistance is due to an altered target site.  There may be a note below or an article discussing the mechanism of resistance in the Fact Sheets and Other Literature   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 1 (Legacy A) resistant Keng Stiffgrass from China please update the database.   Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  Help

CONTRIBUTING WEED SCIENTISTS JINXIN WANG Professor Shandong Agricultural University College Of Plant Protection Daizong Road 61# Tai'an, 271018, Shandong China Email Jinxin Wang GUOHUI YUAN Weed Scientist Shandong Agricultural University Laboratory of Pesticide Toxicology and Application Technique College of Plant Protection Daizong Road 61# Tai’an, 271018, Shandong China Email Guohui Yuan

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 Jinxin Wang, and Guohui Yuan for providing detailed information.

Herbicide Resistant Keng Stiffgrass Globally (Sclerochloa kengiana) Herbicide Resistant Keng Stiffgrass Globally (Sclerochloa kengiana) Drag a column header and drop it here to group by that column Herbicide Resistant Keng Stiffgrass Globally (Sclerochloa kengiana) # Country Country StateName FirstYear Situation Active Ingredients CountryID Site of Action WeedID Species CommonName ResistID 1 China China   2010 Winter wheat clodinafop-propargyl, and fenoxaprop-ethyl 9 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A) 297 Sclerochloa kengiana Keng Stiffgrass 7771

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