Cross‐resistance to imidazolinone herbicides in chlorsulfuron‐resistant <i>Raphanus raphanistrum</i>

Hashem, Abul; Dhammu, Harmohinder

doi:10.1002/ps.555

Cited by 5 publications

(5 citation statements)

References 7 publications

(8 reference statements)

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“…, 2001a; Walsh et al. , 2001; Hashem & Dhammu, 2002), as well as in populations from New South Wales (Tan & Medd, 2002) and South Africa (Smit & Cairns, 2001). Studies on a number of these R. raphanistrum populations determined that resistance is conferred by an altered target site.…”

Section: Resultsmentioning

confidence: 99%

Frequency and distribution of herbicide resistance in Raphanus raphanistrum populations randomly collected across the Western Australian wheatbelt

2007

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Summary In 2003, a random survey was conducted across the Western Australian wheatbelt to establish the extent and frequency of herbicide resistance in Raphanus raphanistrum populations infesting crop fields. Five hundred cropping fields were visited, with 90 R. raphanistrum populations collected, representative of populations present in crop fields throughout the Western Australian wheatbelt. Collected populations were screened with four herbicides of various modes of action that are commonly used for the control of this weed. The majority of Western Australian R. raphanistrum populations were found to contain plants resistant to the acetolactate synthase (ALS)‐inhibiting herbicide chlorsulfuron (54%) and auxin analogue herbicide, 2,4‐D amine (60%). This survey also determined that over half (58%) of these populations were multiple resistant across at least two of the four herbicide modes of action used in the screening. Only 17% of R. raphanistrum populations have retained their initial status of susceptibility to all four herbicides. The distribution patterns of the herbicide‐resistant populations identified that there were higher frequencies of resistant and developing resistance populations occurring in the intensively cropped northern regions of the wheatbelt. These results clearly indicate that the reliance on herbicidal weed control in cropping systems based on reduced tillage and stubble retention will lead to higher frequencies of herbicide‐resistant weed populations. Therefore, within intensive crop production systems, there is a need to diversify weed management strategies and not rely entirely on too few herbicide control options.

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Section: Resultsmentioning

confidence: 99%

Frequency and distribution of herbicide resistance in Raphanus raphanistrum populations randomly collected across the Western Australian wheatbelt

2007

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“…In conclusion, the prevalence of a high genetic diversity in concert with the potential for rapid colonization over long distances facilitate the rapid spread of local R. raphanistrum resistance against common herbicides (Smit and Cairns 2001;Walsh et al 2001;Hashem and Dhammu 2002). This is disadvantageous for commercial crops such as B. napus.…”

Section: Discussionmentioning

confidence: 99%

Patterns of weed invasion: evidence from the spatial genetic structure of Raphanus raphanistrum

et al. 2013

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Knowledge of the pathways of colonization is critical for risk assessment and management of weeds. In this study we adopted a landscape genetics approach to assess the impact of human disturbances and large-scale environmental features on the colonization of a global agricultural weed, Raphanus raphanistrum. We used nuclear microsatellite and chloroplast DNA sequence data to quantify the pattern of genetic diversity in 336 plants collected from 13 sites throughout the Cape Floristic Region, South Africa, one of the world's recognized global biodiversity hotspots. The lack of strong spatial genetic structure suggests that R. raphanistrum colonized throughout the Cape Floristic Region via both local diffusive spread and long-distance jump dispersal. Furthermore, 47 % of analyzed plants contained Raphanus sativus (cultivated radish) chloroplast genomes, indicating historical and/or contemporary gene flow between wild and cultivated radish populations. The prevalence of high genetic diversity and long-distance gene flow are discussed in the context of ecological risk assessment.

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“…The susceptible population had an LD 50 of approximately 5 g ha Ϫ1 . Resistance to ALS-inhibiting herbicides has been identified previously in wild radish populations from WA (Hashem and Dhammu 2002;Hashem et al 2001a) and South Africa (Smit and Cairns 2001). Resistance to chlorsulfuron is now a frequent occurrence in wild radish populations in the wheatbelt region of WA (Walsh et al 2001).…”

Section: Resistance To the Als-inhibiting Herbicide Chlorsulfuronmentioning

confidence: 98%

Multiple-herbicide resistance across four modes of action in wild radish (Raphanus raphanistrum)

et al. 2004

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Populations of wild radish were collected from two fields in the northern Western Australian wheatbelt, where typical herbicide-use patterns had been practiced for the previous 17 seasons within an intensive crop production program. The herbicide resistance status of these populations clearly established that there was multiple-herbicide resistance across many herbicides from at least four modes of action. One population exhibited multiple-herbicide resistance to the phytoene desaturase (PDS)–inhibiting herbicide diflufenican (3.0-fold), the auxin analog herbicide 2,4-D (2.2-fold), and the photosystem II–inhibiting herbicides metribuzin and atrazine. Another population was found to be multiply resistant to the acetolactate synthase–inhibiting herbicides, the PDS-inhibiting herbicide diflufenican (2.5-fold), and the auxin analog herbicide 2,4-D amine (2.4-fold). Therefore, each population has developed multiple-herbicide resistance across several modes of action. The multiple resistance status of these wild radish populations developed from conventional herbicide usage in intensive cropping rotations, indicating a dramatic challenge for the future control of wild radish.

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Cross‐resistance to imidazolinone herbicides in chlorsulfuron‐resistant Raphanus raphanistrum

Cited by 5 publications

References 7 publications

Frequency and distribution of herbicide resistance in Raphanus raphanistrum populations randomly collected across the Western Australian wheatbelt

Frequency and distribution of herbicide resistance in Raphanus raphanistrum populations randomly collected across the Western Australian wheatbelt

Patterns of weed invasion: evidence from the spatial genetic structure of Raphanus raphanistrum

Multiple-herbicide resistance across four modes of action in wild radish (Raphanus raphanistrum)

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