Abstract：
:In this study, we prepared, characterized, and performed toxicity analyses of poly(ε-caprolactone) nanocapsules loaded with neem oil. Three formulations were prepared by the emulsion/solvent evaporation method. The nanocapsules showed a mean size distribution around 400 nm, with polydispersity below 0.2 and were stable for 120 days. Cytotoxicity and genotoxicity results showed an increase in toxicity of the oleic acid + neem formulations according to the amount of oleic acid used. The minimum inhibitory concentrations demonstrated that all the formulations containing neem oil were active. The nanocapsules containing neem oil did not affect the soil microbiota during 300 days of exposure compared to the control. Phytotoxicity studies indicated that NC_20 (200 mg of neem oil) did not affect the net photosynthesis and stomatal conductance of maize plants, whereas use of NC_10 (100:100 of neem:oleic acid) and NC_15 (150:50 of neem:oleic acid) led to negative effects on these physiological parameters. Hence, the use of oleic acid as a complement in the nanocapsules was not a good strategy, since the nanocapsules that only contained neem oil showed lower toxicity. These results demonstrate that evaluation of the toxicity of nanopesticides is essential for the development of environmentally friendly formulations intended for applications in agriculture.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Pasquoto-Stigliani T,Campos EVR,Oliveira JL,Silva CMG,Bilesky-José N,Guilger M,Troost J,Oliveira HC,Stolf-Moreira R,Fraceto LF,de Lima Rdoi
10.1038/s41598-017-06092-4subject
Has Abstractpub_date
2017-07-19 00:00:00pages
5929issue
1issn
2045-2322pii
10.1038/s41598-017-06092-4journal_volume
7pub_type
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