Paraquat Resistance of Sumatran Fleabane (Conyza sumatrensis)

Zobiole, Luiz Henrique Saes; Pereira, Vinícius Gabriel Caneppele; Albrecht, Alfredo Júnior Paiola; Adegas, F. S.; Albrecht, Leandro Paiola

doi:10.1590/s0100-83582019370100018

Cited by 13 publications

(14 citation statements)

References 18 publications

(17 reference statements)

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“…The dose-response curves were performed with the biotype that was controlled the least, in relation to the susceptible biotypes, and that provided the best fit. The susceptible biotype was identified in a previous report Zobiole et al, 2019).…”

Section: Dose-response Curve Experimentsmentioning

confidence: 83%

“…In Brazil, the resistance of Sumatran fleabane to paraquat is recent (Zobiole et al, 2019), but cases report the resistance of C. sumatrensis to paraquat since 1980 in Taiwan, and current reports are from several other countries, including Japan, Egypt, Malaysia, Canada, the United States, Belgium, Sri Lanka, South Africa, and Australia (Fuerst et al, 1985;Chiang & Chiang, 2016;Preston, 2018). Resistance to glyphosate (EPSPs inhibitor) (Table 2) was also observed, confirming the biotype resistance to paraquat and glyphosate.…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2020

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Fleabane (Conyza spp.) is an important weed in grain production systems and is currently one of the most problematic weeds in Brazil. An important factor related to weeds such as fleabane is the characteristic of herbicide-resistant biotypes developed under selection pressure, with multiple resistance previously detected for Conyza spp. Thus, the aim of this study was to demonstrate the multiple resistance of Conyza sumatrensis to the herbicides paraquat, glyphosate, and chlorimuron. From the F2 seeds of biotypes with suspected resistance to paraquat, glyphosate, and chlorimuron, dose-response greenhouse experiments were conducted for the three herbicides. Herbicides were applied when the plants had 6-8 leaves that were at a height of 8 cm. At the end of the evaluations, 28 days after application, multiple resistance to paraquat, glyphosate, and chlorimuron was observed, with resistance factors (RF50) for the control of 7.43, 3.58, and 14.35 and for the reduction of dry mass of 2.65, 2.79, and 11.31, respectively. All the established criteria for demonstrating new cases of weed resistance were met; thus, the first case worldwide of a Conyza species with resistance to herbicides with three different mechanisms of action was confirmed.

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Section: Dose-response Curve Experimentsmentioning

confidence: 83%

Section: Resultsmentioning

confidence: 99%

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

et al. 2020

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“…The first showed fomesafen resistance and it was found in GR-soybean and -cotton fields of Mato Grosso; and C. sumatrensis presented resistance to saflufenacil in soybean fields in the western region of Paraná in the municipalities of Palotina and Assis Chateaubriand [11]. This last species had already been confirmed to be resistance to chlorimuron-ethyl (ALS inhibitor) in 2011 [60] and paraquat (PSI inhibitor) in 2016 [61] within the same region.…”

Section: Resistance To Other Mechanisms Of Actionmentioning

confidence: 99%

Herbicide Resistance in Brazil: Status, Impacts, and Future Challenges

Cruz¹,

Oliveira²,

Carvalho³

et al. 2020

Pests, Weeds and Diseases in Agricultural Crop and Animal Husbandry Production

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Brazil is a large producer and exporter of crops in global terms. Weeds may be responsible for ~14% of crop losses, depending on the crop system. Herbicides occupy 58% of the Brazilian pesticide market; however, the continuous use of these products and the high selection pressure have led to the emergence of weeds resistant to herbicides. Today, there are 51 weed species reported as being resistant to herbicides in Brazil, of which 17 involves cross and multiple-resistance. Acetolactate synthase (ALS), acetyl coenzyme A carboxylase (ACCase) and 5-enolpiruvylshikimate-3-phosphate synthase (EPSPs) inhibitors are the herbicidal groups with the most resistance cases. Soybean, corn, rice, wheat and cotton present 30, 12, 10, 9 and 8 cases, respectively, occurring mainly in herbicide-resistant crop fields from the Southern and Central West regions of the country. To better understand the dimensions of herbicide resistance, in this chapter, we will explore the size of agricultural activity in Brazil, the pesticide market and the use of herbicides in the main crops. In addition, the agronomic, scientific-technical and economic aspects that have contributed, directly or indirectly, to the selection of resistant weeds will be discussed in order to have an overview of the economic impact of herbicide resistance management.

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“…(buva), durante a entressafra em présemeadura, principalmente em aplicação sequencial após a utlizaação de glyphosate e associações (Cesco et al, 2019;Soltani et al, 2020). Contudo nos últimos anos tem-se observado redução na eficácia de paraquat no controle de buva, com relatos de biótipos resistentes de Conyza sumatrensis ao paraquat (Pinho et al, 2019;Zobiole et al, 2019;Albrecht et al, 2020a;Albrecht et al, 2020b).…”

Section: Introductionunclassified

Alternativas ao paraquat para o controle químico de azevém, aveia e buva

Albrecht

Pasini

et al. 2022

J. Biotechnol. Biodivers.

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Com o banimento do paraquat, é necessário planejar o uso de herbicidas alternativos na dessecação de plantas daninhas. Neste sentido desatacam-se herbicidas como glufosinate, saflufenacil, diquat, glyphosate, clethodim, em diferentes associações. Acredita-se que o glufosinate, sobretudo em associações, seja eficaz no controle de Lolium perenne ssp. multiflorum (azevém), Avena fatua (aveia) e/ou Conyza sumatrensis (buva). Objetivou-se avaliar a eficácia de glufosinate isolado, ou em associações, no controle de azevém, aveia e buva, como alternativa ao paraquat. O experimento foi conduzido em área experimental localizada no município de Cruz Alta, estado do Rio Grande do Sul (RS), Brasil, em novembro de 2020. Foi utilizado delineamento inteiramente casualizado, com quatro repetições. Os tratamentos foram compostos pela aplicação de glufosinate, saflufenacil, diquat, glyphosate e clethodim, isolados ou em associações. Foi avaliado o controle de azevém, aveia e buva, aos 7, 14 e 28 dias após aplicação. O glufosinate em associações foi eficaz no controle das plantas daninhas, sendo quase sempre superior ao observado para diquat isolado ou em misturas. Para se antingir a mesma eficácia das associações, a dose de glufosinate deve ser de no mínimo 700 g i.a. ha-1. A aplicação de glufosinate (400 g i.a. ha-1) em associações com saflufenacil, glyphosate e clethodim foi eficaz no controle de azevém, aveia e buva. A aplicação isolada de glufosinate se mostrou eficaz no controle de todas as plantas daninhas na dose máxima aplicada (700 g i.a. ha-1). O glufosinate, isolado ou em associações, caracteriza-se assim alternativa ao paraquat no controle de plantas daninhas.

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Paraquat Resistance of Sumatran Fleabane (Conyza sumatrensis)

Cited by 13 publications

References 18 publications

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

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

Herbicide Resistance in Brazil: Status, Impacts, and Future Challenges

Alternativas ao paraquat para o controle químico de azevém, aveia e buva

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