Post-Emergence Herbicidal Activity of Nanoatrazine Against Susceptible Weeds
Nenhuma Miniatura disponível
Data
2018-03-14
Autores
Sousa, Gustavo F. M.
Gomes, Diego G.
Campos, Estefania V. R.
Oliveira, Jhones L.
Fraceto, Leonardo F.
Stoll-Moreira, Renate
Oliveira, Halley C.
Título da Revista
ISSN da Revista
Título de Volume
Editor
Frontiers Media Sa
Resumo
Pot(epsilon-caprolactone) (PCL) nanocapsules have been previously developed as a carrier system for atrazine. However, the efficacy of this nanoformulation against weeds commonly found in crop cultures has not been tested yet. Here, we evaluated the post-emergence herbicidal activity of PCL nanocapsules containing atrazine against Amaranthus viridis (slender amaranth) and Bidens pilosa (hairy beggarticks), in comparison with a commercial formulation of atrazine. For both species, treatment with atrazine-loaded nanocapsules (at 2,000 g ha(-1)) led to a greater decrease in the photosystem II activity (above 50% inhibition relative to the control) than the commercial atrazine formulation at the same concentration (around 40% inhibition). The growth of A. viridis plants was equally reduced by nanoatrazine and commercial formulation (above 64% for root and 75% for shoot). In the case of B. pilosa, atrazine-loaded nanocapsules decreased more effectively the root and shoot growth than the commercial formulation, leading to a loss of plant biomass. Moreover, for both species, the use of 10-fold diluted atrazine-loaded PCL nanocapsules (200 g ha(-1)) resulted in the same inhibitory effect in root and shoot growth as the commercial formulation at the standard atrazine dose. These results suggest that the utilization3 of atrazine-containing PCL nanocapsules potentiated the post-emergence control of A. viridis and B. pilosa by the herbicide. Thus, this nanoformulation emerges as an efficient alternative for weed control.
Descrição
Palavras-chave
Amaranthus viridis, Bidens Ouse, nanopesticides, nanotechnology, polymeric nanoparticles, trianize herbicides
Como citar
Frontiers In Environmental Science. Lausanne: Frontiers Media Sa, v. 6, 6 p., 2018.