Post-Emergence Herbicidal Activity of Nanoatrazine Against Susceptible Weeds

Autor(es)

Sousa, Gustavo F. M. ^[1] ; Gomes, Diego G. ^[1] ; Campos, Estefania V. R. ^[2] ; Oliveira, Jhones L. ^[2] ; Fraceto, Leonardo F. ^[2] ; Stoll-Moreira, Renate ^[1] ; Oliveira, Halley C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Londrina, Dept Anim & Rant Biol, Londrina - Brazil

^[2] State Univ Paulista Julio de Mesquite Filho, Dept Environm Engn, Sorocaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: FRONTIERS IN ENVIRONMENTAL SCIENCE; v. 6, MAR 14 2018.
• Citações Web of Science: 4

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. (AU)

• Processo FAPESP: 15/15617-9 - Repelentes botânicos e nanotecnologia: desenvolvimento de sistemas para controle de pragas em agricultura
• Beneficiário: Leonardo Fernandes Fraceto
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/20286-9 - Desenvolvimento de sistemas de liberação modificada à base de zeína e quitosana para repelentes botânicos visando o controle de mosca-branca (Bemisia tabaci) em diferentes culturas
• Beneficiário: Jhones Luiz de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Doutorado