International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
MULTIPLE RESISTANT JOHNSONGRASS
(Sorghum halepense)


Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
EPSP synthase inhibitors (G/9)

Argentina, Cordoba
INTRODUCTION JOHNSONGRASS
Johnsongrass (Sorghum halepense) is a monocot weed in the Poaceae family.  In Argentina this weed first evolved multiple resistance (to 2 herbicide sites of action) in 2015 and infests Soybean.  Multiple resistance has evolved to herbicides in the Groups A/1, and G/9.  These particular biotypes are known to have resistance to glyphosate, and haloxyfop-methyl and they may be cross-resistant to other herbicides in the Groups A/1, and G/9.

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 Apr 24, 2015 )

Common NameJohnsongrass
SpeciesSorghum halepense
GroupACCase inhibitors (A/1)
EPSP synthase inhibitors (G/9)
Herbicidesglyphosate, and haloxyfop-methyl
LocationArgentina, Cordoba
Year2015
Situation(s)Soybean
Contributors - (Alphabetically)Diego Ustarroz 
Edit this Case  |  Add New Case of Resistance  |  Add Note

NOTES ABOUT THIS BIOTYPE

GENERAL

Diego Ustarroz

This population is resistant to glyphosate and haloxyfop-metyl, however remains susceptible to clethodim.

See Spanish Paper Here

Edit this Note  |  Add New Note
 

ACADEMIC ASPECTS

Confirmation Tests

Greenhouse, and Laboratory trials comparing a known susceptible Johnsongrass biotype with this Johnsongrass 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, G/1, 9 resistant Johnsongrass 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 Johnsongrass from Argentina please update the database.
 
Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  Help

CONTRIBUTING WEED SCIENTISTS

DIEGO USTARROZ
Research Associate
Inta
Sección Malezas
Ruta 9 Km 636 Manfredi
Córdoba Argentina.
Manfredi, 5688, Córdoba
Argentina
Email Diego Ustarroz

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Argentina have been instrumental in providing you this information. Particular thanks is given to Diego Ustarroz for providing detailed information.
Herbicide Resistant Johnsongrass Globally
(Sorghum halepense)
Herbicide Resistant Johnsongrass Globally
(Sorghum halepense)
Drag a column header and drop it here to group by that column
Herbicide Resistant Johnsongrass Globally
(Sorghum halepense)
#CountryFirstYearSituationActive IngredientsSite of Action
1 ArgentinaArgentina 2005 Soybean glyphosate 48 EPSP synthase inhibitors (G/9)
166Sorghum halepenseJohnsongrass5271
2 ArgentinaArgentina 2015 Soybean haloxyfop-P-methyl 48 ACCase inhibitors (A/1)
166Sorghum halepenseJohnsongrass10979
3 ArgentinaArgentina 2015 Soybean glyphosate, and haloxyfop-methyl 48 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
EPSP synthase inhibitors (G/9)
166Sorghum halepenseJohnsongrass10991
4 ChileChile 2009 Corn (maize) nicosulfuron 8 ALS inhibitors (B/2)
166Sorghum halepenseJohnsongrass5693
5 GreeceGreece 2005 Cotton propaquizafop, and quizalofop-P-ethyl 19 ACCase inhibitors (A/1)
166Sorghum halepenseJohnsongrass5393
6 IsraelIsrael 2006 Cotton fluazifop-P-butyl, and haloxyfop-P-methyl 23 ACCase inhibitors (A/1)
166Sorghum halepenseJohnsongrass5301
7 ItalyItaly 2005 Soybean, and Tomatoes fluazifop-P-butyl, haloxyfop-P-methyl, propaquizafop, and quizalofop-P-ethyl 24 ACCase inhibitors (A/1)
166Sorghum halepenseJohnsongrass5354
8 ItalyItaly 2007 Corn (maize) nicosulfuron 24 ALS inhibitors (B/2)
166Sorghum halepenseJohnsongrass8905
9 MexicoMexico 2009 Corn (maize) foramsulfuron, nicosulfuron, primisulfuron-methyl, and rimsulfuron 29 ALS inhibitors (B/2)
166Sorghum halepenseJohnsongrass5475
10 SerbiaSerbia 2014 Corn (maize) imazamox, nicosulfuron, propoxycarbazone-sodium, pyroxsulam, and rimsulfuron 245 ALS inhibitors (B/2)
166Sorghum halepenseJohnsongrass15065
11 SpainSpain 2015 Corn (maize) nicosulfuron 38 ALS inhibitors (B/2)
166Sorghum halepenseJohnsongrass11000
12 United States (Mississippi) United StatesMississippi1991 Cotton, and Cropland fenoxaprop-P-ethyl, fluazifop-P-butyl, and quizalofop-P-ethyl 45 ACCase inhibitors (A/1)
166Sorghum halepenseJohnsongrass250
13 United States (Kentucky) United StatesKentucky1991 Soybean fluazifop-P-butyl 45 ACCase inhibitors (A/1)
166Sorghum halepenseJohnsongrass488
14 United States (Mississippi) United StatesMississippi1992 Cotton pendimethalin 45 Microtubule inhibitors (K1/3)
166Sorghum halepenseJohnsongrass328
15 United States (Tennessee) United StatesTennessee1995 Cotton, and Soybean fluazifop-P-butyl, and quizalofop-P-ethyl 45 ACCase inhibitors (A/1)
166Sorghum halepenseJohnsongrass1106
16 United States (Virginia) United StatesVirginia1995 Soybean sethoxydim 45 ACCase inhibitors (A/1)
166Sorghum halepenseJohnsongrass1108
17 United States (Louisiana) United StatesLouisiana1997 Cotton clethodim, and fluazifop-P-butyl 45 ACCase inhibitors (A/1)
166Sorghum halepenseJohnsongrass1044
18 United States (Texas) United StatesTexas2000 Corn (maize) imazethapyr, and nicosulfuron 45 ALS inhibitors (B/2)
166Sorghum halepenseJohnsongrass5091
19 United States (West Virginia) United StatesWest Virginia2004 Corn (maize) nicosulfuron 45 ALS inhibitors (B/2)
166Sorghum halepenseJohnsongrass7775
20 United States (Indiana) United StatesIndiana2005 Corn (maize), and Soybean nicosulfuron 45 ALS inhibitors (B/2)
166Sorghum halepenseJohnsongrass5282
21 United States (Kentucky) United StatesKentucky2006 Corn (maize) foramsulfuron, nicosulfuron, and primisulfuron-methyl 45 ALS inhibitors (B/2)
166Sorghum halepenseJohnsongrass7880
22 United States (Arkansas) United StatesArkansas2007 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
166Sorghum halepenseJohnsongrass5344
23 United States (Mississippi) United StatesMississippi2008 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
166Sorghum halepenseJohnsongrass5558
24 United States (Louisiana) United StatesLouisiana2010 Soybean glyphosate 45 EPSP synthase inhibitors (G/9)
166Sorghum halepenseJohnsongrass5522
25 VenezuelaVenezuela 2010 Corn (maize) foramsulfuron, iodosulfuron-methyl-sodium, and nicosulfuron 80 ALS inhibitors (B/2)
166Sorghum halepenseJohnsongrass5553
Literature about Similar Cases

Page size:
select
Page: of 10
Items 1 to 5 of 48

Page size:
select
Page: of 10
Items 1 to 5 of 48
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.  Tuesday, March 28, 2017 .  Available  www.weedscience.org
Copyright © 1993- 2017 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.