INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Dense-flowered Fumitory (Fumaria densiflora) is a dicot weed in the Fumariaceae family. In New South Wales this weed first evolved resistance to Group 3 (Legacy K1) herbicides in 1999 and infests Canola, and Cereals. Group 3 (Legacy K1) herbicides are known as Inhibition of Microtubule Assembly (Inhibition of Microtubule Assembly
). Research has shown that these particular biotypes are resistant to trifluralin and they may be cross-resistant to other Group 3 (Legacy K1) 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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| Common Name | Dense-flowered Fumitory | | Species | Fumaria densiflora | | Group | Inhibition of Microtubule Assembly HRAC Group 3 (Legacy K1)
| | Herbicides | trifluralin | | Location | Australia, New South Wales | | Year | 1999 | | Situation(s) | Canola, and Cereals | | Contributors - (Alphabetically) | Gertraud Norton | |
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| | Gertraud Norton | | One area is located near Owen, South Australia, and the other one near Junee, New South Wales.Edit this Note | Add New Note |
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| | 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.
Edit this Note | Add New Note |
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| | 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. |
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| | Genetic studies on HRAC Group 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 |
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| | 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. |
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| | 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 3 (Legacy K1) resistant Dense-flowered Fumitory from New South Wales please update the database. |
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| Charles Sturt University
Faculty Of Science And Agriculture
Research& Development
14310 Scottslawn Rd,
Wagga Wagga, 2678, New South Wales
Australia
Email Gertraud Norton |
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| Drag a column header and drop it here to group by that column |
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1
| Australia (New South Wales ) | Australia | New South Wales | 1999 |
Canola, and Cereals
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trifluralin
| 1 |
Inhibition of Microtubule Assembly ( HRAC Group 3 (Legacy K1)
| 191 | Fumaria densiflora | Dense-flowered Fumitory | 1178 |
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PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site. Citation:
Heap, I. The International Herbicide-Resistant Weed Database. Online.
. Available
www.weedscience.org
Copyright © 1993-
WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.
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