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Prickly Lettuce |
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Prickly Lettuce (Lactuca serriola) is the most widespread resistant weed of Idaho
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| Introduction |
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About this page |
| There are currently 13 different types (known as 'biotypes') of herbicide resistant weeds in Idaho. The first herbicide resistant weed reported from Idaho is Prickly Lettuce (Lactuca serriola) with resistance to chlorsulfuron, imazethapyr, metsulfuron-methyl, thifensulfuron-methyl, triasulfuron, and tribenuron-methyl, reported in 1987. Local weed scientists estimate that there are 7,740 sites and more than 238,000 acres infested with herbicide resistant weeds in Idaho and they infest cereals, lentils, peas, potato, roadsides, and wheat. The most widespread resistant weed of Idaho is Prickly Lettuce (Lactuca serriola), which infests an estimated 10001-100000 acres and is found primarily in cereals, lentils, peas, and wheat. Italian Ryegrass (Lolium multiflorum), with resistance to clodinafop-propargyl, diclofop-methyl, flufenacet, quizalofop-P-ethyl, and triasulfuron is the most recently discovered (2005) new type of resistant weed in Idaho. |
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This is a resource page to assist you in
managing herbicide-resistant weeds in Idaho . If you have any questions regarding herbicide-resistant
weeds in Idaho 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 Idaho 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 IDAHO | | Weed | Situation | Herbicide Mode of Action | Year | Prickly Lettuce
(Lactuca serriola) | cereals, lentils, peas, wheat | B/2 - ALS inhibitors
(chlorsulfuron, imazethapyr, metsulfuron-methyl, thifensulfuron-methyl, triasulfuron, tribenuron-methyl) | 1987 | Kochia
(Kochia scoparia) | roadsides, wheat | B/2 - ALS inhibitors
(chlorsulfuron) | 1989 | Russian Thistle
(Salsola iberica) | wheat | B/2 - ALS inhibitors
(chlorsulfuron) | 1990 | Italian Ryegrass
(Lolium multiflorum) | lentils, peas, wheat | A/1 - ACCase inhibitors
(clodinafop-propargyl, diclofop-methyl, quizalofop-P-ethyl, sethoxydim) | 1991 | Wild Oat
(Avena fatua) | cereals, wheat | A/1 - ACCase inhibitors
(clodinafop-propargyl, diclofop-methyl, fenoxaprop-P-ethyl) | 1992 | Wild Oat
(Avena fatua) | cereals | N/8 - Thiocarbamates and others
(difenzoquat, triallate) | 1993 | Wild Oat
(Avena fatua) | cereals | Z/27 - Unknown
(difenzoquat, triallate) | 1993 | Mayweed Chamomile
(Anthemis cotula) | cereals, lentils, peas, wheat | B/2 - ALS inhibitors
(chlorsulfuron, imazethapyr, thifensulfuron-methyl, tribenuron-methyl) | 1997 | Kochia
(Kochia scoparia) | roadsides | O/4 - Synthetic Auxins
(dicamba) | 1997 | Redroot Pigweed
(Amaranthus retroflexus) | potato | C1/5 - Photosystem II inhibitors
(metribuzin) | 2005 | Italian Ryegrass
(Lolium multiflorum) | lentils, peas, wheat | A/1 - ACCase inhibitors
(clodinafop-propargyl, diclofop-methyl, flufenacet, quizalofop-P-ethyl, triasulfuron) | 2005 | Italian Ryegrass
(Lolium multiflorum) | lentils, peas, wheat | B/2 - ALS inhibitors
(clodinafop-propargyl, diclofop-methyl, flufenacet, quizalofop-P-ethyl, triasulfuron) | 2005 | Italian Ryegrass
(Lolium multiflorum) | lentils, peas, wheat | K3/15 - Chloroacetamides and others
(clodinafop-propargyl, diclofop-methyl, flufenacet, quizalofop-P-ethyl, triasulfuron) | 2005 |
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HERBICIDE RESISTANT WEEDS IN ADJACENT STATES | | | | | UTAH | | Species | MOA | Year | | Kochia | B/2 | 1998 |
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HERBICIDE RESISTANT WEED CONTACTS IN IDAHO
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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 Idaho has been
provided by the following experts.
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STATE CONTACTS | | PAMELA HUTCHINSON | Associate Professor
University of Idaho
Plant, Soil
and Entomological Science
Aberdeen Research and Extension Center
Aberdeen, 83210, Idaho
United States of America
Phone : (208) 397-4181
Fax : (208) 397-4311
Email Pamela Hutchinson |
| | DON MORISHITA | University of Idaho
Twin Falls R&E Center
P.O. Box 1827
Twin Falls, 83303, Idaho
United States of America
Phone : (208) 736-3616
Fax : (208) 736-0843
Email Don Morishita
Web : Web Site Link |
| | | DONN THILL | University of Idaho
Plant/Soil/Entomology Dept.
Moscow, 83844, Idaho
United States of America
Phone : (208) 885-6214
Fax : (208) 885-7760
Email Donn Thill |
| | DONN THILL | Professor of Weed Science
Univeristy of Idaho
Plant, Soil
and Entomological Sciences
P.O. Box 442339
University of Idaho
Moscow, 83844-2339, Idaho
United States of America
Phone : 208-885-6214
Fax : 208-885-7760
Email Donn Thill |
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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 Idaho have been instrumental in providing you this information.
Particular thanks is given to Pamela Hutchinson, Don Morishita, Timothy Prather, Donn Thill, and Donn Thill for providing detailed information.
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