International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
MULTIPLE RESISTANT TAIWAN BARNYARDGRASS
(Echinochloa crus-galli var. formosensis)


Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)

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 multiple resistance (to 2 herbicide sites of action) in 2010 and infests Rice.  Multiple resistance has evolved to herbicides in the Groups A/1, and B/2.  These particular biotypes are known to have resistance to cyhalofop-butyl, and penoxsulam and they may be cross-resistant to other herbicides in the Groups A/1, and B/2.

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 Jun 08, 2015 )

Common NameTaiwan barnyardgrass
SpeciesEchinochloa crus-galli var. formosensis
GroupACCase inhibitors (A/1)
ALS inhibitors (B/2)
Herbicidescyhalofop-butyl, and penoxsulam
LocationJapan, Okayama
Year2010
Situation(s)Rice
Contributors - (Alphabetically)Satoshi Iwakami, and Akira Uchino 
Edit this Case  |  Add New Case of Resistance  |  Add Note

NOTES ABOUT THIS BIOTYPE

GENERAL

Akira Uchino
Iwakami, S., M.Hashimoto, K.Matsushima, H.Watanabe, K.Hamamura and A.Uchino (2015) Multiple-herbicide resistance in Echinochloa crus-galli var. formosensis, an allohexaploid weed species, in dry-seeded rice. Pesticide Biochemistry and Physiology119,1-8.

Edit this Note  |  Add New 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 Group A, B/1, 2 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 multiple 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 ACCase inhibitors (A/1)
304Echinochloa crus-galli var. formosensisTaiwan barnyardgrass7799
2 JapanJapan 2010 Rice cyhalofop-butyl, and penoxsulam 25 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
304Echinochloa crus-galli var. formosensisTaiwan barnyardgrass10997
Literature about Similar Cases

Page size:
select
Page: of 33
Items 1 to 5 of 163

Page size:
select
Page: of 33
Items 1 to 5 of 163
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, March 29, 2017 .  Available  www.weedscience.org
Copyright © 1993- 2017 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.