International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP C1/5 RESISTANT JIMSONWEED
(Datura stramonium)


Photosystem II inhibitors (C1/5)

United States, Indiana
INTRODUCTION JIMSONWEED
Jimsonweed (Datura stramonium) is a dicot weed in the Solanaceae family.  In Indiana this weed first evolved resistance to Group C1/5 herbicides in 1992 and infests Corn (maize).   Group C1/5 herbicides are known as Photosystem II inhibitors (Inhibition of photosynthesis at photosystem II).  Research has shown that these particular biotypes are resistant to atrazine and they may be cross-resistant to other Group C1/5 herbicides.

The 'Group' letters/numbers that you see throughout this web site refer to the classification of herbicides by their site of action. To see a full list of herbicides and HRAC herbicide classifications click here.

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QUIK STATS (last updated Nov 29, 2000 )

Common NameJimsonweed
SpeciesDatura stramonium
GroupPhotosystem II inhibitors (C1/5)
Herbicidesatrazine
LocationUnited States, Indiana
Year1992
Situation(s)Corn (maize)
Contributors - (Alphabetically)Daniel Childs 
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Daniel Childs
Daviess county, Indiana.

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GENERAL

Daniel Childs
Resistance to atrazine occurred due to the continued use of this product in community of farmers.

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ACADEMIC ASPECTS

Confirmation Tests

Field, Greenhouse, and Laboratory trials comparing a known susceptible Jimsonweed biotype with this Jimsonweed biotype have been used to confirm resistance. For further information on the tests conducted please contact the local weed scientists that provided this information.
 
Genetics

Genetic studies on Group C1/5 resistant Jimsonweed have not been reported to the site.  There may be a note below or an article discussing the genetics of this biotype in the Fact Sheets and Other Literature
 
Mechanism of Resistance

Studies on the mechanism of resistance of Group C1/5 resistant Jimsonweed from Indiana indicate that resistance is due to an altered target site.  There may be a note below or an article discussing the mechanism of resistance in the Fact Sheets and Other Literature
 
Relative Fitness

Researchers have indicated that Group C1/5 resistant Jimsonweed is ecologically less fit than normal susceptible Jimsonweed.  Triazine resistant weeds often exhibit a lower relative fitness when compared to susceptible biotypes.  The most common mutation conferring triazine resistance (Ser 264 to Gly mutation of the psbA gene) also causes a reduction in CO2 fixation, quantum yield, and seed and biomass production..  There may be a note below or an article discussing the fitness of this biotype in the Fact Sheets and Other Literature
 
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CONTRIBUTING WEED SCIENTISTS

DANIEL CHILDS
Now With Monsanto, Was With
Purdue University
Cooperative Extension
Dept of Botany& Plant Pathology
915 West State St, Lilly Hall of Life Sciences
West Lafayette, 47907, Indiana
United States
Email Daniel Childs

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Indiana have been instrumental in providing you this information. Particular thanks is given to Daniel Childs for providing detailed information.
Herbicide Resistant Jimsonweed Globally
(Datura stramonium)
Herbicide Resistant Jimsonweed Globally
(Datura stramonium)
Drag a column header and drop it here to group by that column
Herbicide Resistant Jimsonweed Globally
(Datura stramonium)
#CountryFirstYearSituationActive IngredientsSite of Action
1 United States (Indiana) United StatesIndiana1992 Corn (maize) atrazine 45 Photosystem II inhibitors (C1/5)
75Datura stramoniumJimsonweed407
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