Control of conyza bonariensis with glyphosate associated to adjuvants applied with different spray nozzles

Authors

  • Tiago Lima do Espírito Santo
  • Cristiane Gonçalves de Mendonça
  • Felipe André Sganzerla Graichen
  • Carlos Gilberto Raetano
  • Paulo Eduardo Teodoro

DOI:

https://doi.org/10.14393/BJ-v33n2-33818

Keywords:

Horseweed, Glyphosate, Resistance, Surfactante, Spray Systems.

Abstract

The study aimed to evaluate the control of C. bonariensis in delayed post-emergence stage using different spray nozzles and solutions with and without adjuvants; and to verify the occurrence of resistance to glyphosate, determining the dose-response curve. The experimental design was randomized in factorial (6 spray nozzles x 5 spray solution) in twenty repetitions. The treatments were represented by spray nozzles: XR 110015 XR 11002, TT 11002 AIXR 11002, AIC 11002 and AI 11002. Tested spray solution were: glyphosate; glyphosate + Nimbus®; glyphosate + Agral®; Glyphosate + LI-700® and without herbicide application. The use or not of adjuvants in the spray solution did not differ statistically from the solution containing the herbicide only. The spray nozzles AIXR 11002, TT 11002 and XR 11002 presented best results of control the horseweed from the evaluation of 07 days after application (DAP) and 28 DAP and such spray nozzles maintained the best average of control percentage. The higher dry matter reductions of horseweed were obtained by spray nozzles 110015 XR, TT 11002 and 11002 XR compared with the control. The population evaluated presents biotypes that resist to doses of 2.880 g.ha-1 a.e. of glyphosate. It is concluded that the evaluated biotypes presents tolerance to glyphosate, independent of your association or not with adjuvants.

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Author Biography

Paulo Eduardo Teodoro

Engenheiro Agrônomo pela Universidade Estadual de Mato Grosso do Sul (UEMS) e Engenheiro Civil pela Universidade Anhanguera-UNIDERP. Mestre em Agronomia - área de concentração: Produção Vegetal da Universidade Estadual de Mato Grosso do Sul, Unidade Universitária de Aquidauana (UEMS/UUA), onde participa de pesquisas na área de Fitotecnia com adubos verdes, braquiária, feijão, feijão-caupi, milho, milheto e soja nos seguintes temas: análises de adaptabilidade e estabilidade fenotípica, interação Genótipo x Ambiente, repetibilidade de caracteres, divergência e variabilidade genética, análise de trilha, modelos mistos (REML/BLUP), redes neurais artificiais (RNAs), inferência bayesiana, dentre outros. Desenvolve ainda pesquisas na área de geoestatística e climatologia com ênfase em: modelos matemáticos teóricos e métodos de interpolação, analise de cluster, ajuste de funções de densidade de probabilidade, precipitação provável e tamanho da amostra.

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Published

2017-03-30

How to Cite

SANTO, T.L. do E., MENDONÇA, C.G. de, GRAICHEN, F.A.S., RAETANO, C.G. and TEODORO, P.E., 2017. Control of conyza bonariensis with glyphosate associated to adjuvants applied with different spray nozzles . Bioscience Journal [online], vol. 33, no. 2. [Accessed29 May 2022]. DOI 10.14393/BJ-v33n2-33818. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/33818.

Issue

Section

Agricultural Sciences