International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP A/1 RESISTANT SOUTHERN CRABGRASS
(Digitaria ciliaris)


ACCase inhibitors (A/1)

Brazil, Paraná
INTRODUCTION SOUTHERN CRABGRASS
Southern Crabgrass (Digitaria ciliaris) is a monocot weed in the Poaceae family.  In Brazil this weed first evolved resistance to Group A/1 herbicides in 2002 and infests Soybean.   Group A/1 herbicides are known as ACCase inhibitors (Inhibition of acetyl CoA carboxylase (ACCase)).  Research has shown that these particular biotypes are resistant to cyhalofop-butyl, fenoxaprop-P-ethyl, fluazifop-P-butyl, haloxyfop-methyl, propaquizafop, and sethoxydim and they may be cross-resistant to other Group A/1 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 Apr 18, 2004 )

Common NameSouthern Crabgrass
SpeciesDigitaria ciliaris
GroupACCase inhibitors (A/1)
Herbicidescyhalofop-butyl, fenoxaprop-P-ethyl, fluazifop-P-butyl, haloxyfop-methyl, propaquizafop, and sethoxydim
LocationBrazil, Paraná
Year2002
Situation(s)Soybean
Contributors - (Alphabetically)Pedro Christoffoleti, Luís Henrique Penckowski, and Ramiro Lopez Ovejero 
Edit this Case  |  Add New Case of Resistance  |  Add Note

ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Southern Crabgrass biotype with this Southern Crabgrass 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/1 resistant Southern Crabgrass 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 A/1 resistant Southern Crabgrass from Brazil please update the database.
 
Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  Help

CONTRIBUTING WEED SCIENTISTS

PEDRO CHRISTOFFOLETI
Associate Professor III
Universidade de Sao Paulo
Crop Science Department
ESALQ - USP - LPV - Av. Padua Dias 11 - C. Postal 09
Piracicaba, 13418-900, São Paulo
Brazil
Email Pedro Christoffoleti
Web   : Web Site Link
LUÍS HENRIQUE PENCKOWSKI
Research
Fundaçaõ Abc
Departamento De Herbologia
411 South Donohue Dr.
Castro, 1003, São Paulo
Brazil
Email Luís Henrique Penckowski
Web   : Web Site Link
RAMIRO LOPEZ OVEJERO
Ph.d. Student
Esalq/university Of São Paulo
Crop Production
School Of Agriculture
Food& Wine, PMB 1,
Piracicaba, 13418-900, São Paulo
Brazil
Email Ramiro Lopez Ovejero
Web   : Web Site Link

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Brazil have been instrumental in providing you this information. Particular thanks is given to Pedro Christoffoleti, Luís Henrique Penckowski, and Ramiro Lopez Ovejero for providing detailed information.
Herbicide Resistant Southern Crabgrass Globally
(Digitaria ciliaris)
Herbicide Resistant Southern Crabgrass Globally
(Digitaria ciliaris)
Drag a column header and drop it here to group by that column
Herbicide Resistant Southern Crabgrass Globally
(Digitaria ciliaris)
#CountryFirstYearSituationActive IngredientsSite of Action
1 BrazilBrazil 2002 Soybean cyhalofop-butyl, fenoxaprop-P-ethyl, fluazifop-P-butyl, haloxyfop-methyl, propaquizafop, and sethoxydim 5 ACCase inhibitors (A/1)
225Digitaria ciliarisSouthern Crabgrass5214
Literature about Similar Cases

12
Page size:
select
Page: of 2
Items 1 to 5 of 10

12
Page size:
select
Page: of 2
Items 1 to 5 of 10
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.  Thursday, June 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.