INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Guyanese Arrowhead (Sagittaria guayanensis) is a monocot weed in the Alismataceae family. In Malaysia this weed first evolved resistance to Group 2 (Legacy B) herbicides in 2000 and infests Rice. Group 2 (Legacy B) herbicides are known as Inhibition of Acetolactate Synthase
(Inhibition of Acetolactate Synthase
). Research has shown that these particular biotypes are resistant to bensulfuron-methyl and they may be cross-resistant to other Group 2 (Legacy B) 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 | Guyanese Arrowhead | Species | Sagittaria guayanensis | Group | Inhibition of Acetolactate Synthase
HRAC Group 2 (Legacy B)
| Herbicides | bensulfuron-methyl | Location | Malaysia | Year | 2000 | Situation(s) | Rice | Contributors - (Alphabetically) | Kazuyuki Itoh | |
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| Greenhouse, and Laboratory trials comparing a known susceptible Guyanese Arrowhead biotype with this Guyanese Arrowhead 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 2 resistant Guyanese Arrowhead 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 2 (Legacy B) resistant Guyanese Arrowhead from Malaysia please update the database. |
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| Professor Kobe University Graduate School of Agricultural Science 1-1 Rokkodaicho Kobe, 657-0013, Hyogo Japan Email Kazuyuki Itoh |
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Drag a column header and drop it here to group by that column |
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1
| Malaysia | Malaysia | | 2000 |
Rice
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bensulfuron-methyl
| 28 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 215 | Sagittaria guayanensis | Guyanese Arrowhead | 5145 |
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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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