HRAC GROUP 14 (LEGACY E) RESISTANT ASIAN COPPERLEAF
(Acalypha australis)

Inhibition of Protoporphyrinogen Oxidase HRAC Group 14 (Legacy E)

China

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INTRODUCTION ASIAN COPPERLEAF Asian Copperleaf (Acalypha australis) is a dicot weed in the Euphorbiaceae family.  In China this weed first evolved resistance to Group 14 (Legacy E) herbicides in 2011 and infests Soybean.   Group 14 (Legacy E) herbicides are known as Inhibition of Protoporphyrinogen Oxidase (Inhibition of Protoporphyrinogen Oxidase ).  Research has shown that these particular biotypes are resistant to fomesafen and they may be cross-resistant to other Group 14 (Legacy E) 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 Feb 09, 2013 ) Common Name Asian Copperleaf Species Acalypha australis Group Inhibition of Protoporphyrinogen Oxidase HRAC Group 14 (Legacy E) Herbicides fomesafen Location China Year 2011 Situation(s) Soybean Contributors - (Alphabetically) Tao Jin, and Xuegang Peng  Edit this Case  |  Add New Case of Resistance  |  Add Note

ACADEMIC ASPECTS Confirmation Tests Field, and Greenhouse trials comparing a known susceptible Asian Copperleaf biotype with this Asian Copperleaf 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 14 resistant Asian Copperleaf 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 14 (Legacy E) resistant Asian Copperleaf from China please update the database.   Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  Help

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 Copperleaf Globally (Acalypha australis) Herbicide Resistant Asian Copperleaf Globally (Acalypha australis) Drag a column header and drop it here to group by that column Herbicide Resistant Asian Copperleaf Globally (Acalypha australis) # Country Country StateName FirstYear Situation Active Ingredients CountryID Site of Action WeedID Species CommonName ResistID 1 China China   2011 Soybean fomesafen 9 Inhibition of Protoporphyrinogen Oxidase ( HRAC Group 14 (Legacy E) 280 Acalypha australis Asian Copperleaf 5684

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Cao HongYu ; Li XiangJu ; Liu ShiYang ; Cui HaiLan ; Niu HongBo. 2011. Study on weed controlling efficiency and safety of glyphosate 41% AS in a transgenic glyphosate-resistant soybean field. Weed Science (China) 29 : 22 - 25.

Weed controlling efficacy and safety of glyphosate 41% AS (aqueous solution) were studied in a field planted with transgenic glyphosate-resistant soybean plants in Beijing, China from May to November in 2010. The glyphosate 41% AS markedly controlled main weeds such as Amaranthus retroflexus, Digitaria sanguinalis, Acalypha australis. The controlling efficacy on weeds was above 90% at 30 days after application of glyphosate 41% AS at 922.5 g a.i./ha. Glyphosate 41% AS was safe to the four herbicide-resistant soybean cultivars (356043, 87701RR2Y, 06-698 and 07 -1568). There were no injuries occurred in the 4 soybean cultivars when glyphosate 41% AS was applied at 922.5-2460.0 g a.i./ha. The plant height, number of compound leaves, number of seeds per pod and 100-seed weight of the 4 cultivars did not tend to decline?The yield of the 4 soybean cultivars with application of glyphosate 41% AS at 922.5-2460.0 g a.i./ha increased significantly than the yield in the absence of application..

Li Tao ; Shen GuoHui ; Qian ZhenGuan ; Chai XiaoLing ; Wen GuangYue. 2009. Study on control technique of glyphosate-resistant weeds. Acta Agriculturae Shanghai 25 : 54 - 58.

The directed inter-row spraying experiment was conducted in an orangery to control weeds resistant to glyphosate. The results showed that 41% glyphosate AS (1 000-1 500 g ai/hm²)+70% saflufenacil WG (12.5-25.0 g ai/hm²)+adjuvant Dash (1% of spray liquid volume) could not only effectively control the damage caused by such glyphosate-resistant broadleaf weeds as Cayratia japonica, Acalypha australis, Erigeron philadelphicus and Solidago canadensis and the regeneration of perennial weeds, but also be equivalent to 20% paraquat AS in control speed and safe for the orange growth..

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