<b>HRAC Group 2</b> <font size='2'> (Legacy B) </font> resistant Neslia paniculata from Canada, Alberta

INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE

HRAC GROUP 2 (LEGACY B) RESISTANT BALL MUSTARD
(Neslia paniculata)

Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)

Canada, Alberta

INTRODUCTION		BALL MUSTARD
Ball Mustard (Neslia paniculata) is a dicot weed in the Brassicaceae family. In Alberta this weed first evolved resistance to Group 2 (Legacy B) herbicides in 1998 and infests Cropland, and Wheat. Group 2 (Legacy B) herbicides are known as Inhibition of Acetolactate Synthase (Inhibition of Acetolactate Synthase ). Research has shown that these particular biotypes are resistant to metsulfuron-methyl and they may be cross-resistant to other Group 2 (Legacy B) 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 Jun 06, 2000 )
Common Name	Ball Mustard
Species	Neslia paniculata
Group	Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Herbicides	metsulfuron-methyl
Location	Canada, Alberta
Year	1998
Situation(s)	Cropland, and Wheat
Contributors - (Alphabetically)	Lyle Friesen, John O'Donovan, and Rene Van Acker
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

John O'Donovan

North Central Alberta

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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Ball Mustard biotype with this Ball Mustard 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 2 resistant Ball Mustard 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 2 (Legacy B) resistant Ball Mustard from Alberta please update the database.

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CONTRIBUTING WEED SCIENTISTS

LYLE FRIESEN

University Of Manitoba Agriculture Bldg Rua Hugo Cabral 1065 Apto 301 Winnipeg, R3T 2N2, Manitoba Canada Email Lyle Friesen

JOHN O'DONOVAN

Agriculture And Agri-Food Canada Agriculture Bldg Universidad Nacional De Mar Del Plata Ruta Nacional 226, Km 73.5, Beaverlodge, T0H 0C0, Alberta Canada Email John O'Donovan

RENE VAN ACKER

University Of Manitoba Agriculture Bldg 1608 McClaren Dr. Winnipeg, R3T 2N2, Manitoba Canada Email Rene Van Acker

ACKNOWLEDGEMENTS
The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Alberta have been instrumental in providing you this information. Particular thanks is given to Lyle Friesen, John O'Donovan, and Rene Van Acker for providing detailed information.

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Herbicide Resistant Ball Mustard Globally
(Neslia paniculata)

Country

FirstYear

Situation

Active Ingredients

Site of Action

Canada (Alberta)

1998

Cropland, and Wheat

metsulfuron-methyl

Inhibition of Acetolactate Synthase ( HRAC Group 2 (Legacy B)

Literature about Similar Cases

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Francis, A. ; Warwick, S. I.. 2003. The biology of Canadian weeds. 120. Neslia paniculata (L.) Desv. Canadian Journal of Plant Science 83 : 441 - 451.

A review of biological information is provided for Neslia paniculata. Native to central Eurasia, this species is naturalized in other temperate regions of the northern hemisphere. In North America, it is most abundant in Canada's prairie provinces, but has spread west and north to British Columbia, Alaska, Yukon and the Northwest Territories, and to scattered locations in eastern Canada and the northern USA. It is typically a summer annual weed of disturbed soils. Its growth habit and persistence in the seed bank have enabled it to spread as an adventive and to maintain its presence in cultivated areas. While it is present in relatively low frequency as a weed in most crops, its indehiscent seed pods can contaminate harvested crops and spread in seed commodities. The small size of its seed pods and the similarity of its seeds to those of rape and condiment mustard have led to its regulation as a significant contaminant of commercial seed. It is generally well controlled by herbicides (e.g., sulfonylureas, glyphosate, MCPA, bromoxynil, and 2,4-D); however, a population resistant to metsulfuron-methyl, one of the Group 2 herbicides that inhibit acetolactate synthase, was found at a site in Alberta in 1998..

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