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Kochia |
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Kochia (Kochia scoparia) is the most widespread resistant weed of North Dakota
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| Introduction |
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About this page |
| There are currently 10 different types (known as 'biotypes') of herbicide resistant weeds in North Dakota. The first herbicide resistant weed reported from North Dakota is Kochia (Kochia scoparia) with resistance to chlorsulfuron, and metsulfuron-methyl, reported in 1987. Local weed scientists estimate that there are 1,820 sites and more than 1,513,100 acres infested with herbicide resistant weeds in North Dakota and they infest cereals, corn, cropland, soybean, sunflower, and wheat. The most widespread resistant weed of North Dakota is Kochia (Kochia scoparia), which infests an estimated 1-2 million acres and is found primarily in cropland, and wheat. Marshelder (Iva xanthifolia), with resistance to imazamox, and tribenuron-methyl is the most recently discovered (2003) new type of resistant weed in North Dakota. |
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This is a resource page to assist you in
managing herbicide-resistant weeds in North Dakota . If you have any questions regarding herbicide-resistant
weeds in North Dakota please contact an
expert in your area. If you have encountered a computer related error on the site then contact
support@weedscience.org. If you are a weed scientist wanting to add or correct information on this page then please contact
research@weedscience.org
or add the
information directly.
Scroll down this page to view tables on
herbicide resistant weeds in North Dakota and its adjacent states as well as a list of articles about
herbicide resistant weeds in your region. Click on the links within
the table to view a case of resistance in more detail.
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HERBICIDE RESISTANT WEEDS IN NORTH DAKOTA | | Weed | Situation | Herbicide Mode of Action | Year | Kochia
(Kochia scoparia) | cropland, wheat | B/2 - ALS inhibitors
(chlorsulfuron, metsulfuron-methyl) | 1987 | Green Foxtail
(Setaria viridis) | sunflower, wheat | K1/3 - Dinitroanilines and others
(trifluralin) | 1989 | Wild Oat
(Avena fatua) | cereals, wheat | A/1 - ACCase inhibitors
(diclofop-methyl, fenoxaprop-P-ethyl) | 1991 | Kochia
(Kochia scoparia) | wheat | O/4 - Synthetic Auxins
(dicamba) | 1995 | Wild Oat
(Avena fatua) | wheat | B/2 - ALS inhibitors
(imazamethabenz-methyl) | 1996 | Kochia
(Kochia scoparia) | corn | C1/5 - Photosystem II inhibitors
(atrazine) | 1998 | Redroot Pigweed
(Amaranthus retroflexus) | soybean | B/2 - ALS inhibitors
(imazethapyr) | 1999 | Wild Mustard
(Sinapis arvensis) | soybean | B/2 - ALS inhibitors
(cloransulam-methyl, imazethapyr, thifensulfuron-methyl) | 1999 | Eastern Black Nightshade
(Solanum ptycanthum) | soybean | B/2 - ALS inhibitors
(imazamox, imazethapyr) | 1999 | Marshelder
(Iva xanthifolia) | soybean | B/2 - ALS inhibitors
(imazamox, tribenuron-methyl) | 2003 |
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HERBICIDE RESISTANT WEEDS IN ADJACENT STATES | | | | | |
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FACT SHEETS AND OTHER LITERATURE | Format | | | | 2000 North Dakota Weed Control Guide - Herbicide Resistance.
Richard K. Zollinger (2000)
North Dakota State University
Herbicide resistance (R) occurs from repeated use of a herbicide that eliminates susceptible (S) weed species and allows R weed species to increase in the absence of competition from the S plant species. Genetically diverse weed species may contain a small percentage of plants that are R to herbicides having the same mode of action. Repeated exposure of a weed population to a herbicide may result in a rapid buildup of weed resistance to that class of herbicides. R types may dominate over time du. | HTM | | | | Herbicide Resistant Weeds in North Dakota - Real Audio Radio Interview.
Dan Gunderson (2000)
Northern Plains News Service
Saturday, September 9, 2000.
Alan Dexter and Richard Zollinger discuss herbicide resistant weeds with Dan
Gunderson. Real Audo (4 min).. | htm |
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HERBICIDE RESISTANT WEED CONTACTS IN NORTH DAKOTA
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Your local state
university extension agent or local department of agriculture
representative may be able to provide you with more information on
herbicide-resistant weeds in your region. Much of the information
about herbicide-resistant weeds in North Dakota has been
provided by the following experts.
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STATE CONTACTS | | MICK ANDERSON | Dow AgroSciences
4850 Rose Creek Parkway
Fargo, 58104-6843, North Dakota
United States of America
Phone : (701) 237-0189
Fax : (701) 461-9125 |
| | MIKE CHRISTOFFERS | North Dakota State University
Dept. of Crop and Weed Sciences
Loftsgard Hall
Box 5051
Fargo, 58105, North Dakota
United States of America
Phone : (701) 231-1054
Email Mike Christoffers |
| | KIRK HOWATT | Assistant Professor
North Dakota State University
Dept. of Plant Sciences
470-F Loftsgard Hall
Box 5051
Fargo, 58105-5051, North Dakota
United States of America
Phone : (701) 231 7209
Fax : 701-231-8474
Email Kirk Howatt |
| | RICHARD ZOLLINGER | North Dakota State University
Dept. of Crop and Weed Sciences
Loftsgard Hall
Box 5051
Fargo, 58105, North Dakota
United States of America
Phone : (701) 237-8157
Fax : (701) 237-8474
Email Richard Zollinger |
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| Acknowledgements |
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Where to now? |
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The
North American Herbicide Resistance Action Committee and weed
scientists in North Dakota have been instrumental in providing you this information.
Particular thanks is given to Mick Anderson, Mike Christoffers, Kirk Howatt, and Richard Zollinger for providing detailed information.
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