<b>HRAC Group 22</b> <font size='2'> (Legacy D) </font> resistant Mitracarpus hirtus from Australia, Queensland

INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

HRAC GROUP 22 (LEGACY D) RESISTANT TROPICAL GIRDLEPOD
(Mitracarpus hirtus )

PS I Electron Diversion HRAC Group 22 (Legacy D)

Australia, Queensland

INTRODUCTION		TROPICAL GIRDLEPOD
Tropical Girdlepod (Mitracarpus hirtus ) is a dicot weed in the Rubiaceae family. In Queensland this weed first evolved resistance to Group 22 (Legacy D) herbicides in 2007 and infests Orchards. Group 22 (Legacy D) herbicides are known as PS I Electron Diversion (PSI Electron Diversion ). Research has shown that these particular biotypes are resistant to diquat, and paraquat and they may be cross-resistant to other Group 22 (Legacy D) 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 Apr 17, 2008 )
Common Name	Tropical Girdlepod
Species	Mitracarpus hirtus
Group	PS I Electron Diversion HRAC Group 22 (Legacy D)
Herbicides	diquat, and paraquat
Location	Australia, Queensland
Year	2007
Situation(s)	Orchards
Contributors - (Alphabetically)	Christopher Preston
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Tropical Girdlepod biotype with this Tropical Girdlepod 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 22 resistant Tropical Girdlepod 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 22 (Legacy D) resistant Tropical Girdlepod from Queensland please update the database.

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CONTRIBUTING WEED SCIENTISTS

CHRISTOPHER PRESTON

University Of Adelaide - Waite Campus Crc For Australian Weed Management And School Of Agriculture Box 2146 Adelaide, 5064, South Australia Australia Email Christopher Preston

ACKNOWLEDGEMENTS
The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Queensland have been instrumental in providing you this information. Particular thanks is given to Christopher Preston for providing detailed information.

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Herbicide Resistant Tropical Girdlepod Globally
(Mitracarpus hirtus )

Country

FirstYear

Situation

Active Ingredients

Site of Action

Australia (Queensland)

2007

Orchards

diquat, and paraquat

PS I Electron Diversion ( HRAC Group 22 (Legacy D)

Literature about Similar Cases

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Heap, I. The International Herbicide-Resistant Weed Database. Online. Saturday, November 23, 2024 . Available www.weedscience.org Copyright © 1993- 2024 WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.