Chemical control of Conyza sumatrensis, Digitaria insularis and Commelina benghalensis at soybean pre-sowing in the soybean/corn system

Giuzeppe Augusto Maram Caneppele; Alfredo Junior Paiola Albrecht; João Pedro  de Barros Leinecker; Laércio Augusto Pivetta; Arthur Arrobas Martins Barroso; Leandro Paiola Albrecht

doi:10.14393/BJ-v42n0a2026-83417

Authors

Giuzeppe Augusto Maram Caneppele Federal University of Paraná
Alfredo Junior Paiola Albrecht Federal University of Paraná
João Pedro de Barros Leinecker Federal University of Paraná
Laércio Augusto Pivetta Federal University of Paraná
Arthur Arrobas Martins Barroso Federal University of Paraná
Leandro Paiola Albrecht Federal University of Paraná

DOI:

https://doi.org/10.14393/BJ-v42n0a2026-83417

Keywords:

Benghal dayflower, Sourgrass, Sumatran fleabane, Weeds.

Abstract

Conyza sumatrensis, Digitaria insularis, and Commelina benghalensis are common weeds in Brazil’s soybean/corn production systems. This study aimed to evaluate effective, sustainable control strategies for managing these difficult-to-control species. Two experiments were conducted in soybean/corn succession areas in Caarapó, MS, Brazil, during the 2020/2021 season. In Experiment 1, the area presented D. insularis, C. sumatrensis, and C. benghalensis. In Experiment 2, the area was dominated by C. sumatrensis at different development stages. Both experiments followed a randomized block design (RBD), with 4 replications. Weed control was evaluated 7, 14, and 28 days after the last application. The combination of glufosinate and carfentrazone followed by a sequential application of glyphosate and clethodim was effective in controlling D. insularis. For C. benghalensis, no herbicide alone or in combination provided satisfactory control. For C. sumatrensis, control depended on the stage of plant development, being effective with an isolated application of glufosinate or as part of a mixture.

References

ALBRECHT, A. J. P. et al. Alternativas ao paraquat para o controle químico de azevém, aveia e buva. Journal of Biotechnology and Biodiversity, 2022, 10(1). https://doi.org/10.20873/jbb.uft.cemaf.v10n1.albrecht

ALBRECHT, A.J.P., et al. Control of Conyza spp. with sequential application of glufosinate in soybean pre-sowing. Ciência Rural. 2020, 50, e20190868. https://doi.org/10.1590/0103-8478cr20190868

ALBRECHT, A. et al. Pre-sowing application of combinations of burndown and pre-emergent herbicides for Conyza spp. control in soybean. Agronomía Colombiana, 2021, 39(1). https://doi.org/10.15446/agron.colomb.v39n1.89545

BOTTCHER, A.A., et al. Herbicide efficacy in the fall management of Richardia brasiliensis, Commelina benghalensis, Conyza sumatrensis and Digitaria insularis. Bioscience Journal. 2022, 38, e38025. https://doi.org/10.14393/BJ-v38n0a2022-53544

CASSOL, M. et al. Misturas de herbicidas para o controle de Conyza sumatrensis com resistência múltipla na dessecação pré-semeadura da soja. Revista Brasileira de Ciências Agrárias, 2024, 19(3), e3719. https://doi.org/10.5039/agraria.v19i3a3719

CORREIA, N. M. Chemical and cultural management strategies for glyphosate-resistant sourgrass in central Brazil. Pesquisa Agropecuária Brasileira, 2023, 58, e02900. https://doi.org/10.1590/S1678-3921.pab2023.v58.02900

DOĞAN, M. N. et al. Conyza species in citrus orchards and vineyards of Turkey and their management with glyphosate. Emirates Journal of Food and Agriculture, 2023, 35(2). https://doi.org/10.9755/ejfa.2023.v35.i2.2999

FERREIRA, D.F. Sisvar: a computer statistical analysis system. Ciência e Agrotecnologia. 2011, 35(6), 1039-1042. http://dx.doi.org/10.1590/S1413-70542011000600001

FILUS, A. et al. Application technology and effectiveness of auxin herbicides in controlling Conyza sumatrensis and Commelina benghalensis. Revista de Agricultura Neotropical, 2024, 11(1), e8319. https://doi.org/10.32404/rean.v11i1.8319

GAZOLA, J. et al. Influência da estatura da Conyza spp. na eficiência de controle por herbicidas auxínicos. Agrarian, 2022, 15(55), e14568. https://doi.org/10.30612/agrarian.v15i55.14568

GAZZIERO, D.L.P., et al. Estimating yield losses in soybean due to sourgrass interference. Planta Daninha. 2019, 37, e019190835. http://dx.doi.org/10.1590/s0100-83582019370100047

MACLAREN, C., et al. An ecological future for weed science to sustain crop production and the environment. A review. Agronomy for Sustainable Development, 2020, 40 (24). https://doi.org/10.1007/s13593-020-00631-6

MENDES, R. R. et al. Interval between sequential herbicide treatments for sourgrass management. Rev. Caatinga, 2020, 33(3), 579–590. https://doi.org/10.1590/1983-21252020v33n301rc

MENDES, R. R., et al. Monitoring Glyphosate- and Chlorimuronresistant Conyza spp. Populations in Brazil. Anais da Academia Brasileira de Ciências | Annals of the Brazilian Academy of Sciences, 2021, 93 (1), e20190425. https://doi.org/10.1590/0001-3765202120190425

MEYER, C. J. et al. Antagonism in mixtures of glufosinate + glyphosate and glufosinate + clethodim on grasses. Weed Technology, 2021, 35, 12–21. https://doi.org/10.1017/wet.2020.49

PATIL, A. G. et al. A review of weed management in different crops. International Journal of Current Science, 2020, 8(4), 4013-4023. https://doi.org/10.22271/chemi.2020.v8.i4ay.10276

PALHARANI, W. et al. Management of Digitaria insularis in soybean pre-sowing desiccation by ACCase alternative herbicides and its impact on soybean carryover. Journal of Environmental Science and Health, Part B, 2023, 58, 110–119. https://doi.org/10.1080/03601234.2023.2172279

SCOTT, A.J., and KNOTT, M. A cluster-analysis method for grouping means in analysis of variance. Biometrics. 1974, 30(3), 507-512. https://doi.org/10.2307/2529204

SILVA, P. V. da et al. Control strategies for Conyza spp. in soybean pre-planting: Single or sequential applications? Research, Society and Development, 2021, 10(8), e10310816995. https://doi.org/10.33448/rsd-v10i8.16995

TAKANO, H. K. et al. Glufosinate enhances the activity of protoporphyrinogen oxidase inhibitors. Weed Science, 2020, 68, 324–332. https://doi.org/10.1017/wsc.2020.39

TREZZI, M.M., et al. Impact of Conyza bonariensis density and establishment period on soyabean grain yield, yield components and economic threshold. Weed Research. 2015, 55(1), 34-41. https://doi.org/10.1111/wre.12125

VELINI, E.D., OSIPE, R. and GAZZIERO, D.L.P. Procedimentos para instalação, avaliação e análise de experimentos com herbicidas. Londrina: SBCPD, 1995.

ZOBIOLE, L. H. S. et al. Management programs to control Conyza spp. in pre-soybean sowing applications. Planta Daninha, 2018, 36, e018175883. https://doi.org/10.1590/S0100-83582018360100076