International Survey of Herbicide-Resistant Weeds

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


ACCase inhibitors (A/1)

United States, New Jersey
INTRODUCTION SMOOTH CRABGRASS
Smooth Crabgrass (Digitaria ischaemum) is a monocot weed in the Poaceae family.  In New Jersey this weed first evolved resistance to Group A/1 herbicides in 1996 and infests Turf.   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 fenoxaprop-P-ethyl 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 Sep 15, 2000 )

Common NameSmooth Crabgrass
SpeciesDigitaria ischaemum
GroupACCase inhibitors (A/1)
Herbicidesfenoxaprop-P-ethyl
LocationUnited States, New Jersey
Year1996
Situation(s)Turf
Contributors - (Alphabetically)Jeffrey Derr 
Edit this Case  |  Add New Case of Resistance  |  Add Note

NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Jeffrey Derr
Limited area in southern part of New Jersey.

Edit this Note  |  Add New Note
 

ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Smooth Crabgrass biotype with this Smooth 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 Smooth 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 Smooth Crabgrass from New Jersey please update the database.
 
Edit Case  |  Add Note  |  Add Article  |  Add New Case  |  Help

CONTRIBUTING WEED SCIENTISTS

JEFFREY DERR
Virginia Tech
Bovey Bldg
50 Stone Road E,
Virginia Beach, 23455, Virginia
United States
Email Jeffrey Derr

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in New Jersey have been instrumental in providing you this information. Particular thanks is given to Jeffrey Derr for providing detailed information.
Herbicide Resistant Smooth Crabgrass Globally
(Digitaria ischaemum)
Herbicide Resistant Smooth Crabgrass Globally
(Digitaria ischaemum)
Drag a column header and drop it here to group by that column
Herbicide Resistant Smooth Crabgrass Globally
(Digitaria ischaemum)
#CountryFirstYearSituationActive IngredientsSite of Action
1 United States (New Jersey) United StatesNew Jersey1996 Turf fenoxaprop-P-ethyl 45 ACCase inhibitors (A/1)
177Digitaria ischaemumSmooth Crabgrass556
2 United States (California) United StatesCalifornia2002 Rice quinclorac 45 Synthetic Auxins (O/4)
177Digitaria ischaemumSmooth Crabgrass5134
Literature about Similar Cases

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

1
Page size:
select
Page: of 1
Items 1 to 5 of 5
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.