International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP B/2 RESISTANT WATER STARWORT
(Myosoton aquaticum)


ALS inhibitors (B/2)

China, Jiangsu, Henan
INTRODUCTION WATER STARWORT
Water Starwort (Myosoton aquaticum) is a dicot weed in the Caryophyllaceae family.  In China this weed first evolved resistance to Group B/2 herbicides in 2010 and infests Winter wheat.   Group B/2 herbicides are known as ALS inhibitors (Inhibition of acetolactate synthase ALS (acetohydroxyacid synthase AHAS)).  Research has shown that these particular biotypes are resistant to tribenuron-methyl and they may be cross-resistant to other Group B/2 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 Apr 08, 2012 )

Common NameWater Starwort
SpeciesMyosoton aquaticum
GroupALS inhibitors (B/2)
Herbicidestribenuron-methyl
LocationChina, Jiangsu, Henan
Year2010
Situation(s)Winter wheat
Contributors - (Alphabetically)Weitang Liu, and Jinxin Wang 
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse, and Laboratory trials comparing a known susceptible Water Starwort biotype with this Water Starwort 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 B/2 resistant Water Starwort indicate that the inheritance is determined by a one gene, dominant trait.  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 B/2 resistant Water Starwort from China 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

There is no record of differences in fitness or competitiveness of these resistant biotypes when compared to that of normal susceptible biotypes.  If you have any information pertaining to the fitness of Group B/2 resistant Water Starwort from China please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

WEITANG LIU
Shandong Agicultural University
College Of Plant Protection
Daizong Road 61# Tai'an
71018
Tai'an, 271018
China
Email Weitang Liu
JINXIN WANG
Professor
Shandong Agricultural University
College Of Plant Protection
Daizong Road 61#
Tai'an, 271018, Shandong
China
Email Jinxin Wang

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in China have been instrumental in providing you this information. Particular thanks is given to Weitang Liu, and Jinxin Wang for providing detailed information.
Herbicide Resistant Water Starwort Globally
(Myosoton aquaticum)
Herbicide Resistant Water Starwort Globally
(Myosoton aquaticum)
Drag a column header and drop it here to group by that column
Herbicide Resistant Water Starwort Globally
(Myosoton aquaticum)
#CountryFirstYearSituationActive IngredientsSite of Action
1 ChinaChina 2010 Winter wheat tribenuron-methyl 9 ALS inhibitors (B/2)
273Myosoton aquaticumWater Starwort5611
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