International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP K1/3 RESISTANT DENSE-FLOWERED FUMITORY
(Fumaria densiflora)


Microtubule inhibitors (K1/3)

Australia, New South Wales
INTRODUCTION DENSE-FLOWERED FUMITORY
Dense-flowered Fumitory (Fumaria densiflora) is a dicot weed in the Fumariaceae family.  In New South Wales this weed first evolved resistance to Group K1/3 herbicides in 1999 and infests Canola, and Cereals.   Group K1/3 herbicides are known as Microtubule inhibitors (Microtubule assembly inhibition).  Research has shown that these particular biotypes are resistant to trifluralin and they may be cross-resistant to other Group K1/3 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 Jun 06, 2000 )

Common NameDense-flowered Fumitory
SpeciesFumaria densiflora
GroupMicrotubule inhibitors (K1/3)
Herbicidestrifluralin
LocationAustralia, New South Wales
Year1999
Situation(s)Canola, and Cereals
Contributors - (Alphabetically)Gertraud Norton 
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Gertraud Norton
One area is located near Owen, South Australia, and the other one near Junee, New South Wales.

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GENERAL

Gertraud Norton
Fumaria densiflora is a weed commonly occurring in crops in southern New South Wales and South Australia. Its control in crops like conventional canola and legumes can be difficult once it has emerged. In 1999, two morphlogically and phenologically different biotypes were identified as being resistant to trifluralin.They evolved in similar situations with frequent applications of trifluralin during the past 10 to 15 years. Repeat trials in 2000 confirmed the relative difference between susceptible and resistant biotypes. However,an overall greater efficacy of trifluralin and pendimethalin could be observed in that year. It is suspected that this was due to higher average temperatures during the initial trial period which might have increased the effectiveness of the herbicides while at the same time being too high for optimum germination of this fumitory species. A number of other accessions which were tested in 1999 were clearly also showing a tendency for reduced susceptibility in comparison with the susceptible control.

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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Dense-flowered Fumitory biotype with this Dense-flowered Fumitory 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 K1/3 resistant Dense-flowered Fumitory 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

The mechanism of resistance for this biotype is either unknown or has not been entered in the database.  If you know anything about the mechanism of resistance for this biotype then please update the database.
 
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 K1/3 resistant Dense-flowered Fumitory from New South Wales please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

GERTRAUD NORTON
Charles Sturt University
Faculty Of Science And Agriculture
Research& Development
14310 Scottslawn Rd,
Wagga Wagga, 2678, New South Wales
Australia
Email Gertraud Norton

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in New South Wales have been instrumental in providing you this information. Particular thanks is given to Gertraud Norton for providing detailed information.
Herbicide Resistant Dense-flowered Fumitory Globally
(Fumaria densiflora)
Herbicide Resistant Dense-flowered Fumitory Globally
(Fumaria densiflora)
Drag a column header and drop it here to group by that column
Herbicide Resistant Dense-flowered Fumitory Globally
(Fumaria densiflora)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (New South Wales ) AustraliaNew South Wales 1999 Canola, and Cereals trifluralin 1 Microtubule inhibitors (K1/3)
191Fumaria densifloraDense-flowered Fumitory1178
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Tuesday, September 17, 2019 .  Available  www.weedscience.org
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