Cross-resistance patterns of winter wild oat (Avena ludoviciana) populations to ACCase inhibitor herbicides

Sasanfar, Hamidreza; Eskandar, Zand; Baghestani, M. A.; Mirhadi, Mohammad Javad; Mesgaran, Mohsen B.

doi:10.1007/s12600-017-0587-9

Cited by 13 publications

(9 citation statements)

References 24 publications

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“…The results of this study clearly indicate that pinoxaden and cycloxydim have become ineffective at controlling some of the APP resistant P. brachystachys populations and these herbicides should not be considered as alternative herbicides for the effective control of resistant populations. Our results regarding this species are in agreement with the results reported by others regarding the different levels of cross-resistance patterns of different weeds resistant to the three groups of ACCase-inhibiting herbicides [18,24]. The Italian ryegrass (Lolium multiflorum) with DM resistance was also cross-resistant to pinoxaden [28].…”

Section: Discussionsupporting

confidence: 92%

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The First Case of Short-Spiked Canarygrass (Phalaris brachystachys) with Cross-Resistance to ACCase-Inhibiting Herbicides in Iran

et al. 2019

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The weed Phalaris brachystachys Link. severely affects winter cereal production. Acetyle-CoA Carboxylase (ACCase)-inhibiting herbicides are commonly used to control this weed in wheat fields. Thirty-six populations with suspected resistance to ACCase-inhibiting herbicides were collected from wheat fields in the Golestan Province in Iran. A rapid test performed in Petri dishes and whole-plant dose-response experiments were conducted to confirm and investigate the resistance level of P. brachystachys to ACCase-inhibiting herbicides. The seed bioassay results showed that 0.02 mg ai L −1 clodinafop-propargyl (CP) and 1.36 mg ai L −1 of the diclofop-methyl (DM) solution were the optimal amounts for reliably screening resistant and susceptible P. brachystachys populations. In the whole plant bioassay, all populations were found to be resistant to CP, resistance ratios ranging from 2.7 to 11.6, and all of the CP-resistant populations exhibited resistance to DM. Fourteen populations showed low resistance to cycloxydim, and thirteen of these populations were also 2-fold resistant to pinoxaden. The results showed that DM resistance in some P. brachystachys populations is likely due to their enhanced herbicide metabolism, which involves Cytochrome P450 monooxygenases, as demonstrated by the indirect assay. This is the first report confirming the cross-resistance of ACCase-inhibiting herbicides in P. brachystachys in Iran.

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Section: Discussionsupporting

confidence: 92%

“…The seed bioassay method for determining resistant and susceptible populations has been previously utilized [16][17][18]. This method is regarded as the most rapid and simplest way to screen resistant and susceptible populations.…”

Section: Discussionmentioning

confidence: 99%

The First Case of Short-Spiked Canarygrass (Phalaris brachystachys) with Cross-Resistance to ACCase-Inhibiting Herbicides in Iran

et al. 2019

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“…Equation was also used to compare absolute ED 50 across several putatively resistant and susceptible populations of Avena sterilis subsp. ludoviciana (winter wild oat) 25 . We suggest using the actual response (raw data) instead of transformed data, estimating the absolute ED 50 of the curves and finally calculating the RI based on absolute ED 50 derived from the actual response.…”

Section: Common Errorsmentioning

confidence: 99%

Perspective: common errors in dose–response analysis and how to avoid them

Keshtkar

Kudsk

Mesgaran

2021

Pest Management Science

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Dose–response experiments are conducted to determine the toxicity of chemicals on organisms. The relationship between dose and response is described by different statistical models. The four‐parameter log‐logistic model is widely used in pesticide sciences to derive biologically relevant parameters such as ED50 and resistance index (RI). However, there are some common errors associated with the calculation of ED50 and RI that can lead to erroneous conclusions. Here we discuss five common errors and propose guidance to avoid them. We suggest (i) all response curves must be fitted simultaneously to allow for proper comparison of parameters across curves, (ii) in the case of nonparallel curves absolute ED50 must be used instead of relative ED50, (iii) standard errors or confidence intervals of the parameters must be reported, (iv) the e parameter in asymmetrical models is not equal to ED50 and hence absolute ED50 must be estimated, and (v) when the four‐parameter log‐logistic model returns a negative value for the lower asymptote, which is biologically meaningless in most cases, the model should be reduced to its three‐parameter version or other types of model should be applied. The mixed‐effects model and the meta‐analytic approach are suggested as appropriate to average the parameters across repeated dose–response experiments. © 2021 Society of Chemical Industry

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“…Haloxyfop-methyl is a systemic herbicide of the aryloxyphenoxypropionic (APP) chemical group, which inhibits the enzyme acetyl coenzyme-A carboxylase (ACCase), responsible for catalyzing the synthesis reactions of fatty acids by interrupting the formation of lipids and cell membranes (Sasanfar et al, 2017). In Brazil, it is registered for post-emergence grass control in soybean, cotton, and beans (Brasil, 2020).…”

Section: Introductionmentioning

confidence: 99%

Mefenpyr-diethyl as a safener for haloxyfop-methyl in bahiagrass

et al. 2021

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Mefenpyr-diethyl is a foliar-acting safener of the pyrazoline chemical group, and after its absorption, the metabolization and detoxification of herbicides occur in treated plants. Studies have demonstrated the protective effect of this safener for the herbicide fenoxaprop-P-ethyl in grass. Thus, this work aimed to evaluate whether a tank mixture of mefenpyr-diethyl has a protective response to haloxyfop-methyl in non-perennial bahiagrass. The experiment had a completely randomized design and was carried out in a greenhouse, using five replications with a 10x2 factorial scheme and ten doses of haloxyfop-methyl (0.00, 0.24, 0.49, 0.97, 1.95, 3.90, 7.79, 15.59, 31.28, and 62.35 g a.i. ha-1) in the presence or absence of a tank mixture of mefenpyr-diethyl (50 g a.i. ha-1). Phytotoxicity and electron transport rate (ETR) were evaluated at 7, 14, 21, and 28 days after application (DAA), in addition to plant height and dry biomass at 28 DAA. In general, phytotoxicity increased due to the higher levels of the herbicide haloxyfop-methyl. The application of mefenpyr-diethyl, in turn, provided lower levels of phytotoxicity, as well as lower reductions in ETR, height, and dry biomass when compared to untreated plants. These results show the safener action of a tank mixture of mefenpyr-diethyl on low doses of haloxyfop-methyl in non-perennial bahiagrass.

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Cross-resistance patterns of winter wild oat (Avena ludoviciana) populations to ACCase inhibitor herbicides

Cited by 13 publications

References 24 publications

The First Case of Short-Spiked Canarygrass (Phalaris brachystachys) with Cross-Resistance to ACCase-Inhibiting Herbicides in Iran

The First Case of Short-Spiked Canarygrass (Phalaris brachystachys) with Cross-Resistance to ACCase-Inhibiting Herbicides in Iran

Perspective: common errors in dose–response analysis and how to avoid them

Mefenpyr-diethyl as a safener for haloxyfop-methyl in bahiagrass

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