International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
HRAC GROUP 1 (LEGACY A) RESISTANT TAIWAN BARNYARDGRASS
(Echinochloa crus-galli var. formosensis)


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

Japan, Okayama
INTRODUCTION TAIWAN BARNYARDGRASS
Taiwan barnyardgrass (Echinochloa crus-galli var. formosensis) is a monocot weed in the Poaceae family.  In Japan this weed first evolved resistance to Group 1 (Legacy A) herbicides in 2009 and infests Rice.   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 cyhalofop-butyl 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.

If we do not have a picture for this weed, or you can provide a better picture (scan, digital camera etc) please please e-mail it to us.

QUIK STATS (last updated Dec 29, 2013 )

Common NameTaiwan barnyardgrass
SpeciesEchinochloa crus-galli var. formosensis
GroupInhibition of Acetyl CoA Carboxylase HRAC Group 1 (Legacy A)
Herbicidescyhalofop-butyl
LocationJapan, Okayama
Year2009
Situation(s)Rice
Contributors - (Alphabetically)Satoshi Iwakami, and Akira Uchino 
Edit this Case  |  Add New Case of Resistance  |  Add Note

ACADEMIC ASPECTS

Confirmation Tests

Greenhouse, and Laboratory trials comparing a known susceptible Taiwan barnyardgrass biotype with this Taiwan barnyardgrass 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 Taiwan barnyardgrass 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 1 (Legacy A) resistant Taiwan barnyardgrass from Japan please update the database.
 
Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  Help

CONTRIBUTING WEED SCIENTISTS

SATOSHI IWAKAMI
Weed Scientist
University of Tsukuba
Faculty of Life and Environmental Sciences
1-1-1 Tennoudai
Tsukuba, 305-8577, Ibaraki
Japan
Email Satoshi Iwakami
AKIRA UCHINO
Weed Scientist
NARO Agricultural Research Center
Faculty of Life and Environmental Sciences
3-1-1 Kannondai
Tsukuba, 305-8666, Ibaraki
Japan
Email Akira Uchino

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Japan have been instrumental in providing you this information. Particular thanks is given to Satoshi Iwakami, and Akira Uchino for providing detailed information.
Herbicide Resistant Taiwan barnyardgrass Globally
(Echinochloa crus-galli var. formosensis)
Herbicide Resistant Taiwan barnyardgrass Globally
(Echinochloa crus-galli var. formosensis)
Drag a column header and drop it here to group by that column
Herbicide Resistant Taiwan barnyardgrass Globally
(Echinochloa crus-galli var. formosensis)
#CountryFirstYearSituationActive IngredientsSite of Action
1 JapanJapan 2009 Rice cyhalofop-butyl 25 Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
304Echinochloa crus-galli var. formosensisTaiwan barnyardgrass7799
2 JapanJapan 2010 Rice cyhalofop-butyl, and penoxsulam 25 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase ( HRAC Group 1 (Legacy A)
Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)
304Echinochloa crus-galli var. formosensisTaiwan barnyardgrass10997
Literature about Similar Cases

Page size:
select
Page: of 34
Items 1 to 5 of 169

Page size:
select
Page: of 34
Items 1 to 5 of 169
PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site.
Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Wednesday, November 13, 2024 .  Available  www.weedscience.org
Copyright © 1993- 2024 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.