Multiple resistance of Conyza sumatrensis to three mechanisms of action of herbicides

Albrecht, Alfredo Júnior Paiola; Pereira, Vinícius Gabriel Caneppele; Souza, Cristian Natalino Zanfrilli de; Zobiole, Luiz Henrique Saes; Albrecht, Leandro Paiola; Adegas, F. S.

doi:10.4025/actasciagron.v42i1.42485

Cited by 18 publications

(22 citation statements)

References 19 publications

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“…In the dose–response experiments with tribenuron-methyl, two populations were confirmed as resistant to sulfonylureas. Both R1 and R2 were highly resistant to tribenuron-methyl, and all plants survived 16 times the recommended field dose, as reported in previous studies in G. coronaria [ 17 ] or in others broadleaf species [ 34 ], these include Descurainia sophia [ 35 ], Lamium amplexicaule [ 36 ], Papaver rhoeas [ 37 ], Conyza sumatrensis [ 38 ], Diplotaxis erucoides , and Erucaria hispanica [ 39 ]. Finally, in field trials, triazolopyrimidines (pyroxsulam + florasulam) control levels were limited or even ineffective, which suggests a possible cross resistance to this ALS family, as reported in other weed species [ 36 ].…”

Section: Discussionsupporting

confidence: 67%

Field Survey and Resistance Occurrence to ALS-Inhibiting Herbicides in Glebionis coronaria L. in Tunisian Wheat Crops

Hada

Khammassi

Jenfaoui

et al. 2020

Plants

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Glebionis coronaria (L.) Cass. ex Spach is a troublesome weed in cereal cropping systems in northern Tunisia. Recently, failures in controlling this weed have been reported by farmers. Field surveys and farmers interviews were conducted to highlight the potential causes of G. coronaria occurrence and the associated yield losses in wheat. Survey results revealed a significant correlation between farmers’ awareness of resistance occurrence and cultural practices, mainly sowing date and tillage, while G. coronaria abundance was related to the lack of herbicide rotation and the frequency of ALS-inhibiting herbicide use. High G. coronaria infestations (more than 20 plants/m2) caused a significant decrease in wheat grain yield, reaching almost 75% at a density of 100 plants/m2. Field and pot experiments showed low efficacies of ALS-inhibiting herbicides to control G. coronaria populations. The application of field rates of tribenuron-methyl and mesosulfuron + iodosulfuron failed to control the tested populations, and generally, G. coronaria dry weight increased compared to nontreated ones (potential hormetic effect). These findings were further investigated in two selected resistant populations through tribenuron dose–response experiments, plants from both populations exhibited high resistance factors (greater than 300), surviving up to 16-fold the recommended field dose. This is the first report for G. coronaria resistance occurrence to ALS-inhibiting herbicides in Tunisia and the second case worldwide.

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Section: Discussionsupporting

confidence: 67%

Field Survey and Resistance Occurrence to ALS-Inhibiting Herbicides in Glebionis coronaria L. in Tunisian Wheat Crops

Hada

Khammassi

Jenfaoui

et al. 2020

Plants

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“…In Erigeron species, ALS inhibitors were chronologically the second mode of action that had efficiency compromised by the selection of resistant biotypes in mid-2014 [9]. Since then, several studies have reported multiple resistance in some populations, such as a biotype resistant to EPSPS inhibitors, ALS inhibitors, and photosystem I inhibitors [3]. Another case was described with the resistance to these same mechanisms plus photosystem II inhibitory and protophorphyrinogen-oxidase (PPO) inhibitors [2].…”

Section: Discussionmentioning

confidence: 99%

“…Three Erigeron species are commonly found across South America territories: Erigeron bonariensis (L.) Cronquist, Erigeron sumatrensis (L.) Cronquist, and Erigeron canadensis (L.) Cronquist [1]. To date, many studies in the literature report Sumatran fleabane (Erigeron sumatrensis) as the most frequent species infesting soybean fields in Southern Brazil [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

A Target-Site Mutation Confers Cross-Resistance to ALS-Inhibiting Herbicides in Erigeron sumatrensis from Brazil

Silva

Mendes

Suzukawa

et al. 2022

Plants

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Cases of weed resistant to herbicides have changed the dynamics of agricultural areas in Brazil, and in recent years, Erigeron species have caused major problems to farmers in the country, mainly in relation to the ineffectiveness of herbicide treatments used. The objective of this study was to confirm the cross-resistance to ALS inhibitors in populations of Erigeron sumatrensis as well as to investigate the existence of mutations in the site of action of ALS-inhibiting herbicides. To do this, 30 populations collected in the 2016/2017 crop season were grown in a greenhouse. Dose–response (chlorimuron-ethyl and cloransulam-methyl), inhibition of cytochrome P-450 with malathion, and ALS gene sequencing experiments were carried out in the F1 generations of two fleabane populations. The results proved the cross-resistance to chlorimuron-ethyl and cloransulam-methyl herbicides applied in the post-emergence of the resistant population of E. sumatrensis. The higher activity of P450 enzymes is unlikely responsible for the resistance of the population studied. The resistance mechanism found in R was the target site mutation Pro197Ser at the ALS gene. This is the first study in Brazil to identify a target-site change as a survival mechanism in E. sumatrensis for the resistance to ALS-inhibiting herbicides.

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“…Another serious problem, especially in Southern Brazil, is the control of Conyza spp., since biotypes with multiple resistance have already been reported (Albrecht et al, 2020). Three species of the genus Conyza have been identified in Brazil: C. bonariensis, C. canadensis, and C. sumatrensis.…”

Section: Consequences Of Gr Soybean Cultivationmentioning

confidence: 99%

Glyphosate-resistant (GR) soybean and corn in Brazil: past, present, and future

Adegas¹,

Correia²,

Silva³

et al. 2022

Advances in Weed Science

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Glyphosate-Resistant Crops (GR crops) have caused considerable changes in weed management worldwide. In Brazil, GR cultivars of soybean and corn were officially introduced in the 2005/06 and 2011/12 crops, respectively. This technology has radically changed the weed management system, having an enormous impact on national agriculture. The objective of this review was to analyze the general aspects that led to the adoption of this technology in Brazil and present its future consequences and challenges. The adoption of GR soybean and corn was swift and comprehensive. Ten years after its introduction, GR soybean and corn are grown in most areas with these crops in Brazil. This success can be attributed to the reduction of costs, the broad spectrum of control provided by glyphosate, the solution for effective management resistance to ALS and ACCase inhibitors, the excellent managing of weeds that are difficult to control, the reduction of crop injury and carryover problems. However, the exclusive and consecutive use of glyphosate alone resulted in intense selection pressure for resistant weeds to this herbicide, which has become one of the most prominent challenges with these crops. Therefore, the future sustainability of GR soybean and corn will not be possible without the combination with other technologies, within integrated weed management.

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Multiple resistance of Conyza sumatrensis to three mechanisms of action of herbicides

Cited by 18 publications

References 19 publications

Field Survey and Resistance Occurrence to ALS-Inhibiting Herbicides in Glebionis coronaria L. in Tunisian Wheat Crops

Field Survey and Resistance Occurrence to ALS-Inhibiting Herbicides in Glebionis coronaria L. in Tunisian Wheat Crops

A Target-Site Mutation Confers Cross-Resistance to ALS-Inhibiting Herbicides in Erigeron sumatrensis from Brazil

Glyphosate-resistant (GR) soybean and corn in Brazil: past, present, and future

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