| There are currently 5 different types (known as 'biotypes') of herbicide resistant weeds in Louisiana. The first herbicide resistant weed reported from Louisiana is Common cocklebur (Xanthium strumarium) with resistance to MSMA, reported in 1992. Local weed scientists estimate that there are 10 sites and more than 6,400 acres infested with herbicide resistant weeds in Louisiana and they infest cotton, rice, and soybean. The most widespread resistant weed of Louisiana is Barnyardgrass (Echinochloa crus-galli), which infests an estimated 1001-10000 acres and is found primarily in rice. Barnyardgrass (Echinochloa crus-galli), with resistance to quinclorac is the most recently discovered (1998) new type of resistant weed in Louisiana. |
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This is a resource page to assist you in
managing herbicide-resistant weeds in Louisiana . If you have any questions regarding herbicide-resistant
weeds in Louisiana 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 Louisiana 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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Barnyardgrass (Echinochloa crus-galli) is the most widespread resistant weed of Louisiana