| Full text | |
| Author(s): |
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]
Total Authors: 7
|
| Affiliation: | [1] Univ Estadual Londrina, Dept Anim & Rant Biol, Londrina - Brazil
[2] State Univ Paulista Julio de Mesquite Filho, Dept Environm Engn, Sorocaba - Brazil
Total Affiliations: 2
|
| Document type: | Journal article |
| Source: | FRONTIERS IN ENVIRONMENTAL SCIENCE; v. 6, MAR 14 2018. |
| Web of Science Citations: | 4 |
| Abstract | |
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) | |
| FAPESP's process: | 15/15617-9 - Botanical repellents and nanotechnology: development of systems for pest control in agriculture |
| Grantee: | Leonardo Fernandes Fraceto |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 14/20286-9 - Development of modified release systems based on zein and chitosan for botanical repellents aiming the control of whitefly (Bemisia tabaci) in different cultures |
| Grantee: | Jhones Luiz de Oliveira |
| Support Opportunities: | Scholarships in Brazil - Doctorate |