<b>HRAC Group 15</b> <font size='2'> (Legacy K3 N) </font> resistant Sporobolus fertilis from Australia, New South Wales

International Survey of Herbicide-Resistant Weeds

LOGIN | REGISTER
Tuesday, April 16, 2024

HRAC GROUP 15 (LEGACY K3 N) RESISTANT GIANT PARRAMATTA GRASS
(Sporobolus fertilis)

Very Long-Chain Fatty Acid Synthesis inhibitorsHRAC Group 15 (Legacy K3 N)

Australia, New South Wales

INTRODUCTION		GIANT PARRAMATTA GRASS
Giant Parramatta grass (Sporobolus fertilis) is a monocot weed in the Poaceae family. In New South Wales this weed first evolved resistance to Group 15 (Legacy K3 N) herbicides in 2004 and infests Pastures. Group 15 (Legacy K3 N) herbicides are known as Very Long-Chain Fatty Acid Synthesis inhibitors (Inhibition of Very Long-Chain Fatty Acid Synthesis ). Research has shown that these particular biotypes are resistant to dalapon, and flupropanate and they may be cross-resistant to other Group 15 (Legacy K3 N) 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.

QUIK STATS (last updated Feb 03, 2015 )
Common Name	Giant Parramatta grass
Species	Sporobolus fertilis
Group	Very Long-Chain Fatty Acid Synthesis inhibitors HRAC Group 15 (Legacy K3 N)
Herbicides	dalapon, and flupropanate
Location	Australia, New South Wales
Year	2004
Situation(s)	Pastures
Contributors - (Alphabetically)	David Officer
Edit this Case \| Add New Case of Resistance \| Add Note

NOTES ABOUT THIS BIOTYPE

GENERAL

David Officer

Ramasamy, S., Pritchard, G., Officer, D., Preston, C., Lawrie, A. C., McLaren, D.A. and Bonilla, J. (2007). Flupropanate Resistance in Giant Parramatta Grass (Sporobolus fertilis). Proc. of Resistance 2007 [Abstract Book]. 16th-18th April Rothamsted Research, Hertfordshire, UK pp.53.

Ramasamy, S., McLaren D.A., Pritchard, G., Officer, D., Bonilla, J., Preston, C. and Lawrie, A.C. (2008). 2, 2 DPA resistance in Giant Parramatta Grass (Sporobolus fertilis). Proceedings of the 16^th Australian Weeds Conference, eds R.D. van Klinken, R.D., V.A. Osten, F.D. Panetta and J.C. Scanlan. (Queensland Weeds Society, Brisbane) pp. 71-73.

Edit this Note | Add New Note

ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Giant Parramatta grass biotype with this Giant Parramatta grass 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 15 resistant Giant Parramatta grass 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 15 (Legacy K3 N) resistant Giant Parramatta grass from New South Wales please update the database.

Edit Case | Add Note | Add Article | Add New Case | Help

CONTRIBUTING WEED SCIENTISTS

DAVID OFFICER

Weed Scientist NSW Department of Primary Industries, PMB 2 Grafton , 2480, New South Wales Australia Email David Officer

ACKNOWLEDGEMENTS
The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in New South Wales have been instrumental in providing you this information. Particular thanks is given to David Officer for providing detailed information.

Drag a column header and drop it here to group by that column

Herbicide Resistant Giant Parramatta grass Globally
(Sporobolus fertilis)

Country

FirstYear

Situation

Active Ingredients

Site of Action

Australia (New South Wales )

2004

Pastures

dalapon, and flupropanate

Very Long-Chain Fatty Acid Synthesis inhibitors ( HRAC Group 15 (Legacy K3 N)

Literature about Similar Cases

Page size:

select

Page: of 1

Items 1 to 1 of 1

Ramasamy, S. ; McLaren, D. A. ; Pritchard, G. ; Officer, D. ; Bonilla, J. ; Preston, C. ; Lawrie, A. C.. 2008. 2,2-DPA resistance in giant Parramatta grass (Sporobolus fertilis). : 71 - 73.

Sporobolus fertilis seeds suspected of being resistant to 2,2-DPA (sodium 2,2-dichloropropionate) were collected near Grafton, NSW, Australia. A seedling Petri-dish assay showed that the 2,2-DPA concentration required to reduce shoot length by 50% in the resistant biotype was about 500 g a.i. kg^-1, five times greater than that for the sensitive biotype. Similarly, a pot-dose assessment in plants showed that the resistant population required 4 and 28 kg a.i. ha^-1 for 50% reductions in shoot height and the proportion of live leaves per plant respectively, more than 2.5 and 14 times the recommended rate, whereas the sensitive plants were well controlled by the recommended rate. This shows that 2,2-DPA resistance has indeed developed in the field and will limit the use of 2,2-DPA for the control of S. fertilis in future..

Page size:

select

Page: of 1

Items 1 to 1 of 1

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, April 16, 2024 . Available www.weedscience.org
Copyright © 1993- 2024 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.