Triallate Resistance inAvena fatuaL. Is Due to Reduced Herbicide Activation

Kern, Anthony J.; Peterson, Dwight M.; Miller, Erica K.; Colliver, Corey C.; Dyer, William E.

doi:10.1006/pest.1996.0070

Cited by 32 publications

(33 citation statements)

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“…Similarly, the high‐level antagonism between prosulfocarb or triallate and phorate confirms that in vivo bioactivation of these thiocarbamate pro ‐herbicides is necessary to cause phytotoxic herbicide damage, but also suggests possible metabolism‐based resistance mechanism(s) for these two thiocarbamate herbicides. For example, in Avena fatua , reduced herbicide metabolic activation via sulfoxidation was found to mediate triallate resistance …”

Section: Discussionmentioning

confidence: 99%

Phorate can reverse P450 metabolism-based herbicide resistance inLolium rigidum

2016

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We report the selective reversal of P450-mediated metabolic multiple resistance to chlorsulfuron and trifluralin in the grass weed L. rigidum by synergistic interaction with the insecticide phorate, and discuss the putative mechanistic basis. This research should encourage diversity in herbicide use patterns for weed control as part of a long-term integrated management effort to reduce the risk of selection of metabolism-based multiple herbicide resistance in L. rigidum. © 2016 Society of Chemical Industry.

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Section: Discussionmentioning

confidence: 99%

Phorate can reverse P450 metabolism-based herbicide resistance inLolium rigidum

2016

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“…Thus, P450‐mediated enhanced herbicide degradation was hypothesised as the mechanism conferring resistance by higher herbicide detoxification ability, as also demonstrated in another study with the same population resistant to a different herbicide mode of action . Conversely, in A. fatua , reduced herbicide activation via a much slower rate of herbicide sulfoxidation (probably P450 mediated) appeared to be the mechanism of resistance to triallate . In addition, a greater level of endogenous giberellin in triallate‐resistant plants could contribute to resistance during early developmental stages of seedlings .…”

Section: Discussionmentioning

confidence: 99%

“…Experimental evidence seems to suggest some diversity of mechanisms in response to triallate in different Avena populations . As most thiocarbamates need in vivo sulfoxidation to deliver herbicidal activity, it has been suggested that a differential rate of herbicide metabolism and subsequent reduced herbicide activation mediate levels of resistance to triallate in A. fatua populations . In addition, studies revealed a potential involvement of endogenous giberellin in resistant populations, with greater gibberellin levels in resistant populations that could result in rapid meristematic growth and preclude phytotoxic levels of thiocarbamate herbicides from reaching the shoot meristem during the most sensitive plant developmental stages …”

Section: Three Major Cases Of Herbicide‐resistant Weeds In Three Cropmentioning

confidence: 99%

Resistance to herbicides inhibiting the biosynthesis of very‐long‐chain fatty acids

Busi

2014

Pest Management Science

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Herbicides that act by inhibiting the biosynthesis of very-long-chain fatty acids (VLCFAs) have been used to control grass weeds in major crops throughout the world for the past 60 years. VLCFA-inhibiting herbicides are generally highly selective in crops, induce similar symptoms in susceptible grasses and can be found within the herbicide groups classified by the HRAC as K3 and N. Even after many years of continuous use, only 12 grass weed species have evolved resistance to VLCFA-inhibiting herbicides. Here, the cases of resistance that have evolved in major grass weed species belonging to the Avena, Echinochloa and Lolium genera in three different agricultural systems are reviewed. In particular we explore the possible reasons why VLCFA herbicides have been slow to select resistant weeds, outline the herbicide mode of action and discuss the resistance mechanisms that are most likely to have been selected.

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“…Thus, currently there is the opportunity to control wild oat by selecting from a diverse range of herbicide modes of action, acting at different stages of crop growth (preseeding, seeding, post-seeding, and late stem elongation). However, there should not be complacency, as previous work has identified Avena populations that have developed resistance to ALS-inhibiting herbicides (Beckie et al 1999;Mengistu et al 2003), triallate (Kern et al 1996), and flamprop-methyl (Friesen et al 2000;Broster 2004). Nevertheless, the availability of herbicide diversity means that herbicide resistance evolution in wild oat can be minimised through diverse herbicide usage and rotation, together with cultural management practices.…”

Section: Future Implicationsmentioning

confidence: 99%

Distribution and frequency of herbicide-resistant wild oat (Avena spp.) across the Western Australian grain belt

Owen

Powles

2009

Crop Pasture Sci.

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Abstract. In 2005, a random survey was conducted across 14 million hectares of the Western Australian grain belt to establish the frequency and distribution of herbicide-resistant wild oat (Avena spp.) in cropping fields. In total, 677 cropping fields were visited, with wild oat populations collected from 150 fields. These wild oat populations were screened with several herbicides commonly used to control this weed. Most of the wild oat populations (71%) were found to contain individuals resistant to the ACCase-inhibiting herbicide diclofop-methyl. Resistance to other ACCase-inhibiting herbicides was markedly lower. Herbicides of alternative modes of action were effective on all wild oat populations. Overall, wild oat resistance to diclofop-methyl was found to be widespread across the Western Australian grain belt, but resistance to other herbicides was relatively low. Therefore, through diversity in herbicide use and with cultural management, it is possible to maintain wild oat populations at a low level and/or minimise herbicide resistance evolution.

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Triallate Resistance inAvena fatuaL. Is Due to Reduced Herbicide Activation

Cited by 32 publications

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Phorate can reverse P450 metabolism-based herbicide resistance inLolium rigidum

Phorate can reverse P450 metabolism-based herbicide resistance inLolium rigidum

Resistance to herbicides inhibiting the biosynthesis of very‐long‐chain fatty acids

Distribution and frequency of herbicide-resistant wild oat (Avena spp.) across the Western Australian grain belt

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