RESISTANCE OF DICOT WEEDS TO ACETOLACTATE SYNTHASE (ALS)-INHIBITING HERBICIDES IN AUSTRALIA

P Boutsalis; Stephen Powles

doi:10.1111/j.1365-3180.1995.tb02028.x

RESISTANCE OF DICOT WEEDS TO ACETOLACTATE SYNTHASE (ALS)-INHIBITING HERBICIDES IN AUSTRALIA

P Boutsalis, Stephen Powles

Research output: Contribution to journal › Article

27 Citations (Scopus)

Abstract

A biotype of Sonchus oleraceus L. and two biotypes of Sisymbrium orientale Torn., SSO 3 and NSO 1, are the first dicot weeds in Australia to develop resistance to ALS-inhibiting herbicides. The resistant biotypes had been exposed to varying periods of selection with sulfonylurea herbicides. All three biotypes are resistant to a range of sulfonylurea and imidazolinone herbicides. The S. orientale biotypes are also resistant to the triazolopyrimidine herbicide, flumetsulam. LD(50) ratios of resistant Sonchus oleraceus for sulfonylurea and imidazolinone herbicides are greater than 64-fold and 4.5-fold, respectively. GR(50) ratios are greater than 9 for sulfonylureas and 7.4 for imazapyr. The LD(50) ratios for both S. orientale biotypes for chlorsulfuron, sulfometuron-methyl, metsulfuron-methyl, flumetsulam and imazethapyr are greater than 110-, 15-, 7-, 24- and 29-fold, respectively. All resistant biotypes are susceptible to MCPA, diuron and diflufenican, herbicides which do not inhibit ALS.

Original language	English
Pages (from-to)	149-155
Journal	Weed Research
Volume	35
DOIs	https://doi.org/10.1111/j.1365-3180.1995.tb02028.x
Publication status	Published - 1995

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@article{4eaa48d523d74cd0a9be9d33a5cc5979,

title = "RESISTANCE OF DICOT WEEDS TO ACETOLACTATE SYNTHASE (ALS)-INHIBITING HERBICIDES IN AUSTRALIA",

abstract = "A biotype of Sonchus oleraceus L. and two biotypes of Sisymbrium orientale Torn., SSO 3 and NSO 1, are the first dicot weeds in Australia to develop resistance to ALS-inhibiting herbicides. The resistant biotypes had been exposed to varying periods of selection with sulfonylurea herbicides. All three biotypes are resistant to a range of sulfonylurea and imidazolinone herbicides. The S. orientale biotypes are also resistant to the triazolopyrimidine herbicide, flumetsulam. LD(50) ratios of resistant Sonchus oleraceus for sulfonylurea and imidazolinone herbicides are greater than 64-fold and 4.5-fold, respectively. GR(50) ratios are greater than 9 for sulfonylureas and 7.4 for imazapyr. The LD(50) ratios for both S. orientale biotypes for chlorsulfuron, sulfometuron-methyl, metsulfuron-methyl, flumetsulam and imazethapyr are greater than 110-, 15-, 7-, 24- and 29-fold, respectively. All resistant biotypes are susceptible to MCPA, diuron and diflufenican, herbicides which do not inhibit ALS.",

author = "P Boutsalis and Stephen Powles",

year = "1995",

doi = "10.1111/j.1365-3180.1995.tb02028.x",

language = "English",

volume = "35",

pages = "149--155",

journal = "Weed Research",

issn = "0043-1737",

publisher = "Wiley-Blackwell",

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T1 - RESISTANCE OF DICOT WEEDS TO ACETOLACTATE SYNTHASE (ALS)-INHIBITING HERBICIDES IN AUSTRALIA

AU - Boutsalis, P

AU - Powles, Stephen

PY - 1995

Y1 - 1995

N2 - A biotype of Sonchus oleraceus L. and two biotypes of Sisymbrium orientale Torn., SSO 3 and NSO 1, are the first dicot weeds in Australia to develop resistance to ALS-inhibiting herbicides. The resistant biotypes had been exposed to varying periods of selection with sulfonylurea herbicides. All three biotypes are resistant to a range of sulfonylurea and imidazolinone herbicides. The S. orientale biotypes are also resistant to the triazolopyrimidine herbicide, flumetsulam. LD(50) ratios of resistant Sonchus oleraceus for sulfonylurea and imidazolinone herbicides are greater than 64-fold and 4.5-fold, respectively. GR(50) ratios are greater than 9 for sulfonylureas and 7.4 for imazapyr. The LD(50) ratios for both S. orientale biotypes for chlorsulfuron, sulfometuron-methyl, metsulfuron-methyl, flumetsulam and imazethapyr are greater than 110-, 15-, 7-, 24- and 29-fold, respectively. All resistant biotypes are susceptible to MCPA, diuron and diflufenican, herbicides which do not inhibit ALS.

AB - A biotype of Sonchus oleraceus L. and two biotypes of Sisymbrium orientale Torn., SSO 3 and NSO 1, are the first dicot weeds in Australia to develop resistance to ALS-inhibiting herbicides. The resistant biotypes had been exposed to varying periods of selection with sulfonylurea herbicides. All three biotypes are resistant to a range of sulfonylurea and imidazolinone herbicides. The S. orientale biotypes are also resistant to the triazolopyrimidine herbicide, flumetsulam. LD(50) ratios of resistant Sonchus oleraceus for sulfonylurea and imidazolinone herbicides are greater than 64-fold and 4.5-fold, respectively. GR(50) ratios are greater than 9 for sulfonylureas and 7.4 for imazapyr. The LD(50) ratios for both S. orientale biotypes for chlorsulfuron, sulfometuron-methyl, metsulfuron-methyl, flumetsulam and imazethapyr are greater than 110-, 15-, 7-, 24- and 29-fold, respectively. All resistant biotypes are susceptible to MCPA, diuron and diflufenican, herbicides which do not inhibit ALS.

U2 - 10.1111/j.1365-3180.1995.tb02028.x

DO - 10.1111/j.1365-3180.1995.tb02028.x

M3 - Article

VL - 35

SP - 149

EP - 155

JO - Weed Research

JF - Weed Research

SN - 0043-1737

ER -