INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Shortleaf Spikesedge (Cyperus brevifolius) is a monocot weed in the Cyperaceae family. In Japan this weed first evolved resistance to Group B/2 herbicides in 2010 and infests Golf courses. Group B/2 herbicides are known as ALS inhibitors (Inhibition of Acetolactate Synthase
). Research has shown that these particular biotypes are resistant to bensulfuron-methyl, and flazasulfuron 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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| Common Name | Shortleaf Spikesedge | | Species | Cyperus brevifolius | | Group | ALS inhibitors (B/2) | | Herbicides | bensulfuron-methyl, and flazasulfuron | | Location | Japan, Kagawa, Saga, Shizuoka, Yamanashi | | Year | 2010 | | Situation(s) | Golf courses | | Contributors - (Alphabetically) | Satoshi Iwakami, and Akira Uchino | |
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| | Akira Uchino | | Okuno,J.,
S.Iwakami, A.Uchino, K.Tsuchida and M.Yokoyama (2015) Response to
halosulfuron-methyl and Flazasulfuron and mutation of acetolactate synthase
gene of Cyperus brevifolius survived in turf grass on golf course. Journal of
Japan Society of Turfgrass Science 43, 159-162 (in Japanese with English
summary).
Edit this Note | Add New Note |
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| | Greenhouse, and Laboratory trials comparing a known susceptible Shortleaf Spikesedge biotype with this Shortleaf Spikesedge 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 Group B/2 resistant Shortleaf Spikesedge 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 B/2 resistant Shortleaf Spikesedge from Japan please update the database. |
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| Weed Scientist
University of Tsukuba
Faculty of Life and Environmental Sciences
1-1-1 Tennoudai
Tsukuba, 305-8577, Ibaraki
Japan
Email Satoshi Iwakami |
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| Weed Scientist
NARO Agricultural Research Center
Faculty of Life and Environmental Sciences
3-1-1 Kannondai
Tsukuba, 305-8666, Ibaraki
Japan
Email Akira Uchino |
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| Drag a column header and drop it here to group by that column |
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| Japan | Japan | | 2010 |
Golf courses
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bensulfuron-methyl, and flazasulfuron
| 25 |
ALS inhibitors (B/2)
| 303 | Cyperus brevifolius | Shortleaf Spikesedge | 7798 |
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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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