Post-Emergence Herbicidal Activity of Nanoatrazine Against Susceptible Weeds

Frontiers in Environmental Science

Gustavo F. M. Sousa¹  Diego G. Gomes¹  Renata Stolf-Moreira¹  Halley C. Oliveira¹  Estefânia V. R. Campos²  Jhones L. Oliveira²  Leonardo F. Fraceto² 

[1] Department of Animal and Plant Biology, State University of Londrina, Londrina, Brazil;Department of Environmental Engineering, State University Paulista Júlio de Mesquita Filho, Sorocaba, Brazil;

关键词: Amaranthus viridis;    Bidens pilosa;    nanopesticides;    nanotechnology;    polymeric nanoparticles;    trianize herbicides;   

DOI  :  10.3389/fenvs.2018.00012

来源: DOAJ

【 摘 要 】

Poly(ε-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 utilization 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.

【 授权许可】

Unknown