Differential tolerance of crotalaria species to herbicides

  • Marcelo Rafael Malardo Universidade Federal de São Carlos
  • Patricia Andrea Monquero Universidade Federal de São Carlos
  • Paulo Vinicius da Silva Universidade Federal de São Carlos
  • Andreia Cristina Silva Hirata Polo da alta sorocabana/Apta
Keywords: green manure, intercropping, selectivity

Abstract

Annual crops and crotalaria intercropping has been used to control nematodes. The evaluation of the susceptibility of crotalaria species to herbicides is an important step to make this technology viable. The aim of this experiment was to determine the tolerance of Crotalaria juncea, C. ochroleuca, C. spectabilis and C. breviflora to pre and post-emergence herbicides. Post-emergence (bentazon, ametryn, amicarbazone, 2,4-D amine and mesotrione) and pre-emergence herbicides (atrazine + mesotrione, atrazine + simazine, atrazine, isoxaflutole, pendimenthalin, s-metolachlor and trifluralin) were evaluated in doses of 0.5D; 0.75D; 1D and 1,25D; in which D was the commercial dose of each product. The results demonstrated that the species of crotalaria differ on the susceptibility to pre and post emergence herbicides. Among the post-emergence herbicides, bentazon showed higher selectivity. However, reduced doses of some post-emergence herbicides can make the intercropping with some species of crotalaria viable. The most selective pre-emergence herbicides were pendimenthalin, s-metolachlor and trifluralin. In general, C. spectabilis was the most susceptible to the evaluated herbicides.

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Author Biographies

Marcelo Rafael Malardo, Universidade Federal de São Carlos
Aluno de graduação/Bolsista Fapesp
Patricia Andrea Monquero, Universidade Federal de São Carlos
Departamento de Recursos Naturais e Proteção Ambiental
Paulo Vinicius da Silva, Universidade Federal de São Carlos
Programa de Pos graduação em agricultura e ambiente
Andreia Cristina Silva Hirata, Polo da alta sorocabana/Apta
Pesquisadora em fitotecnia
Published
11-04-2018
How to Cite
Malardo, M. R., Monquero, P. A., da Silva, P. V., & Silva Hirata, A. C. (2018). Differential tolerance of crotalaria species to herbicides. Comunicata Scientiae, 8(3), 414-423. https://doi.org/10.14295/cs.v8i3.2415
Section
Original Article