| There are currently 7 different types (known as 'biotypes') of herbicide resistant weeds in Texas. The first herbicide resistant weed reported from Texas is Perennial Ryegrass (Lolium perenne) with resistance to sulfometuron-methyl, reported in 1989. Local weed scientists estimate that there are 30 sites and more than 7,400 acres infested with herbicide resistant weeds in Texas and they infest corn, grain sorghum, rice, roadsides, and wheat. The most widespread resistant weed of Texas is Barnyardgrass (Echinochloa crus-galli), which infests an estimated 1001-10000 acres and is found primarily in rice. Johnsongrass (Sorghum halepense), with resistance to imazethapyr, and nicosulfuron is the most recently discovered (2000) new type of resistant weed in Texas. |
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This is a resource page to assist you in
managing herbicide-resistant weeds in Texas . If you have any questions regarding herbicide-resistant
weeds in Texas 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 Texas 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 Texas