Navegando por Autor "Batista, Bruno Gonçalves"

Agora exibindo 1 - 1 de 1
  • Imagem de Miniatura
    Dissertação
    Acesso aberto (Open Access)
    Doses e taxas de aplicação de clethodim e quizalofope-p-metílico para o controle de milho
    (Universidade Estadual do Norte do Paraná, 2018-02-19) Batista, Bruno Gonçalves; Gandolfo, Marco Antônio; https://orcid.org/0000-0003-2314-3752; http://lattes.cnpq.br/5560552732033631; Rodrigues, Euripedes Bomfim; https://orcid.org/0000-0001-6531-878X; http://lattes.cnpq.br/9720688699522760; Osipe, Jethro Barros; http://lattes.cnpq.br/9692340257207288; Abi-Saab, Otávio Jorge Grigoli; http://lattes.cnpq.br/8437035647330384
    Weed control in soybean crops has presented challenges. When sowing follows a second‑season corn crop, volunteer corn is regarded as a weed that is difficult to control. It is therefore necessary to establish the optimal application timing and herbicide rates to achieve satisfactory control. This study aimed to evaluate the efficacy of three rates of two post‑emergence herbicides applied at different concentrations for volunteer corn control. Two experiments were conducted, each comprising twelve treatments and four replications in a randomized complete block design. Treatments combined two spray volumes (100 and 200 L ha⁻¹), two herbicides each applied at three rates — Clethodim (84, 120, and 156 g a.i. ha⁻¹) corresponding to commercial rates of Select (0.35, 0.50, and 0.65 L p.c. ha⁻¹); and Quizalofop‑P‑methyl (85, 100, and 115 g a.i. ha⁻¹) corresponding to commercial rates of Targa (1.7, 2.0, and 2.3 L p.c. ha⁻¹) — plus two spray nozzle types: fine droplet (AXI 11002) and medium droplet (AXI 11003). Control of volunteer corn at growth stages V4–V5 was unaffected by application volume, herbicide rate, droplet size, or spray concentration, indicating that lower water volumes and reduced rates of Clethodim and Quizalofop‑P‑methyl may be used effectively. Quizalofop‑P‑methyl provided superior control compared with Clethodim at growth stages V8–V9, irrespective of application volume, herbicide rate, droplet size, or spray concentration.