Weed control in different germination fluxes with preemergent herbicides on sugarcane straw under dry periods

Authors

  • Paulo Vinicius Da Silva Universidade Federal da Grande Dourados. Faculdade de Ciências Agrarias. Caixa Postal 79.804-970. Dourados. MS. Brasil
  • Paulo Henrique Vieira dos Santos Ourofino Agrociência. Fazenda Experimental Ouro Fino. Caixa Postal 14115-000. Guatapará. SP. Brasil https://orcid.org/0000-0002-9120-5196
  • Patricia Andrea Monquero Universidade Federal de São Carlos. Centro de Ciências Agrarias. Departamento de Recursos Naturais e Proteção Ambienta – DRNPA. Caixa Postal 13600-970. Araras. SP. Brasil
  • Elias Silva de Medeiros Universidade Federal da Grande Dourados. Faculdade de Ciências Agrarias. Caixa Postal 79.804-970. Dourados. MS. Brasil
  • Bruna Ferrari Schedenffeldt Universidade Estadual Paulista. Faculdade de Ciências Agrárias e Veterinárias - Câmpus de Jaboticabal. Caixa Postal 14884-900. Jaboticabal. SP. Brasil
  • Roque De Carvalho Dias Universidade Federal do Triângulo Mineiro. Campus Universitário de Iturama. Caixa Postal 38280-000. Iturama. MG. Brasil
  • Estela Maris Inácio Instituto Master de Ensino Presidente Antônio Carlos. Caixa Postal 38444-128. Araguari. MG. Brasil
  • Daniela Maria Barros Universidade Federal da Grande Dourados. Faculdade de Ciências Agrarias. Caixa Postal 79.804-970. Dourados. MS. Brasil
  • Pedro Antonio Vougoudo Salmazo Universidade Federal da Grande Dourados. Faculdade de Ciências Agrarias. Caixa Postal 79.804-970. Dourados. MS. Brasil
  • Pedro Jacob Christoffoleti Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz, ESALQ ESALQ. Caixa Postal 13418-900. Piracicaba. SP. Brasil
  • Munir Mauad Universidade Federal da Grande Dourados. Faculdade de Ciências Agrarias. Caixa Postal 79.804-970. Dourados. MS. Brasil

DOI:

https://doi.org/10.48162/rev.39.124

Keywords:

amicarbazone, flush, germination, imazapic, precipitation, residue, straw, sulfentrazone, tebuthiuron

Abstract

Preemergent herbicides are a frequent weed control strategy. Considering different crop germinative fluxes, these products must present long-lasting weed control. This study evaluated preemergent herbicides in different germination fluxes of Merremia aegyptia, Mucuna aterrima and Ricinus communis when applied to different quantities of straw and different simulated dry periods. The experiment was conducted in a 4 × 2 × 2 factorial design with four replications. The treatments included four dry periods (0, 30, 60, and 90 days), two straw quantities (0 and 10 t ha 1), and two germination fluxes. The herbicides amicarbazone (1225 g ha-1), imazapic (147 g ha- 1), sulfentrazone (800 g ha-1), and tebuthiuron (900 g ha-1) were applied for preemergence weed control, and germination flush fluxes were evaluated at 7, 14, 21, 28, and 35 days after emergence (DAE) while verifying plant dry mass. Amicarbazone controlled less than 80% of the studied species at the 90-day dry period in the presence of straw. Imazapic did not present control residue for any of the species analyzed. Sulfentrazone showed the same control pattern at all germination fluxes, regardless of the amount of straw. Tebuthiuron successfully controlled all species in the first germination flush, exceeding 80% regardless of the amount of straw. Herbicides associated with straw quantities and dry periods have a significant impact on M. aegyptiaca, M. aterrima and R. communis.

Highlights:

  • The herbicide amicarbazone demonstrated efficacy in controlling during the first germination period of the three weed species.
  • The presence of sugarcane straw significantly influenced the herbicides' control efficacy, especially during prolonged dry periods.
  • The combination of straw and extended dry periods resulted in a reduction in control rates with tebuthiuron.

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Published

27-06-2024

Issue

Section

Plant protection

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