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Smooth Pigweed |
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Smooth Pigweed (Amaranthus hybridus) is the most widespread resistant weed of Kentucky
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| Introduction |
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About this page |
| There are currently 4 different types (known as 'biotypes') of herbicide resistant weeds in Kentucky. The first herbicide resistant weed reported from Kentucky is Smooth Pigweed (Amaranthus hybridus) with resistance to atrazine, reported in 1987. Local weed scientists estimate that there are 330 sites and more than 6,400 acres infested with herbicide resistant weeds in Kentucky and they infest corn, and soybean. The most widespread resistant weed of Kentucky is Smooth Pigweed (Amaranthus hybridus), which infests an estimated 1001-10000 acres and is found primarily in corn. Horseweed (Conyza canadensis), with resistance to glyphosate is the most recently discovered (2001) new type of resistant weed in Kentucky. |
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This is a resource page to assist you in
managing herbicide-resistant weeds in Kentucky . If you have any questions regarding herbicide-resistant
weeds in Kentucky 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 Kentucky 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 KENTUCKY | | Weed | Situation | Herbicide Mode of Action | Year | Smooth Pigweed
(Amaranthus hybridus) | corn | C1/5 - Photosystem II inhibitors
(atrazine) | 1987 | Johnsongrass
(Sorghum halepense) | soybean | A/1 - ACCase inhibitors
(fluazifop-P-butyl) | 1991 | Smooth Pigweed
(Amaranthus hybridus) | soybean | B/2 - ALS inhibitors
(chlorimuron-ethyl, flumetsulam, imazaquin, imazethapyr, nicosulfuron, primisulfuron-methyl, thifensulfuron-methyl) | 1992 | Horseweed
(Conyza canadensis) | soybean | G/9 - Glycines
(glyphosate) | 2001 |
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HERBICIDE RESISTANT WEEDS IN ADJACENT STATES | | | | | | | | | |
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HERBICIDE RESISTANT WEED CONTACTS IN KENTUCKY
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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 Kentucky has been
provided by the following experts.
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STATE CONTACTS | | J. GREEN | University of Kentucky
Agronomy Dept.
106B Ag Science Bldg. Agronomy
Lexington, 40546-0091, Kentucky
United States of America
Phone : (606) 257-4898
Fax : (606) 258-1952
Email J. Green |
| | C B ROGERS | Associate Professor of Agriculture
Morehead State University
Department of Agriculture and Human Sciences
UPO 702, 150 University Blvd.
Morehead , 40351, Kentucky
United States of America
Phone : 606-783-2660
Fax : 606-783-5067
Email C B Rogers |
| | WILLIAM WITT | University of Kentucky
Agronomy Dept.
N-106C Ag Science Ctr. North
Lexington, 40546, Kentucky
United States of America
Phone : (606) 257-1823
Fax : (606) 323-1952
Email William Witt |
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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 Kentucky have been instrumental in providing you this information.
Particular thanks is given to J. Green, C B Rogers, and William Witt for providing detailed information.
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