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American Black Nightshade |
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American Black Nightshade (Solanum americanum) is the most widespread resistant weed of Florida
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| Introduction |
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About this page |
| There are currently 5 different types (known as 'biotypes') of herbicide resistant weeds in Florida. The first herbicide resistant weed reported from Florida is American Black Nightshade (Solanum americanum) with resistance to paraquat, reported in 1985. Local weed scientists estimate that there are 140 sites and more than 16,600 acres infested with herbicide resistant weeds in Florida and they infest aquatic, cropland, and tomatoes. The most widespread resistant weed of Florida is American Black Nightshade (Solanum americanum), which infests an estimated 1001-10000 acres and is found primarily in tomatoes. Palmer Amaranth (Amaranthus palmeri), with resistance to imazapic, and pyrithiobac-Na is the most recently discovered (2008) new type of resistant weed in Florida. |
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This is a resource page to assist you in
managing herbicide-resistant weeds in Florida . If you have any questions regarding herbicide-resistant
weeds in Florida 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 Florida 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 FLORIDA | | Weed | Situation | Herbicide Mode of Action | Year | American Black Nightshade
(Solanum americanum) | tomatoes | D/22 - Bipyridiliums
(paraquat) | 1985 | Goosegrass
(Eleusine indica) | tomatoes | D/22 - Bipyridiliums
(paraquat) | 1996 | Dotted Duckweed
(Landoltia punctata) | aquatic | D/22 - Bipyridiliums
(diquat, paraquat) | 2001 | Hydrilla
(Hydrilla verticillata) | aquatic | F1/12 - Carotenoid biosynthesis inhibitors
(fluridone) | 2002 | Palmer Amaranth
(Amaranthus palmeri) | cropland | B/2 - ALS inhibitors
(imazapic, pyrithiobac-Na) | 2008 |
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HERBICIDE RESISTANT WEEDS IN ADJACENT STATES | | | |
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HERBICIDE RESISTANT WEED CONTACTS IN FLORIDA
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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 Florida has been
provided by the following experts.
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STATE CONTACTS | | BRANDON FAST | Graduate Research Assistant
University of Florida
Agronomy
PO Box 110505
Gainesville, 32611, Florida
United States of America
Phone : 3528715869
Fax : 3523921840
Email Brandon Fast |
| | JASON FERRELL | Asst. Professor
University of Florida
Agronomy
258 Museum Rd
Gainesville, 32611, Florida
United States of America
Phone : 352-392-7512
Email Jason Ferrell |
| | TYLER KOSCHNICK | Visiting Assistant Professor
University of Florida
Agronomy
Center for Aquatic Plants
7922 NW 71st St
Gainesville, 32653, Florida
United States of America
Phone : 352-392-5126
Fax : 352-392-3462
Email Tyler Koschnick |
| | GREG MACDONALD | University of Florida
Agronomy Dept
P.O. Box 110500
304 Newell Hall
Gainsville, 32611-0500, Florida
United States of America
Phone : +1 (352) 392-6196
Email Greg MacDonald |
| | WILLIAM STALL | University of Florida
Horticultural Sciences Dept.
1243 Fifield Hall
Gainsville, 32611, Florida
United States of America
Phone : (352) 392-2134 ext. 207
Fax : (352) 392-6479
Email William Stall |
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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 Florida have been instrumental in providing you this information.
Particular thanks is given to Brandon Fast, Jason Ferrell, Tyler Koschnick, Greg MacDonald, and William Stall for providing detailed information.
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