Essential Metal-Based Nanoparticles (Copper/Iron NPs) as Potent Nematicidal Agents against Meloidogyne spp.

Abstract

Root-knot nematodes (Meloidogyne spp.) cause great economic impact in the sector of agriculture while the number of existing commercial nematicides has been drastically reduced. The metal-based nanoparticles offer new possibilities as agrochemicals. In the current study, we shed light on the role of copper/iron based nanoparticles as bioactive agents against the root knot nematode Meloidogyne spp; along with the plant enhancement properties on the nematode infested host. Same sized PEGylated Cu, CuFe and CuFeO 2 NPs, were solvothermally synthesized characterized and evaluated against M. incognita and M. javanica nematodes, in terms of paralysis and biological cycle arrest in tomato plants. Comparisons were made against the commercial nematicide fosthiazate. All the tested compositions revealed nematicidal activity, but CuFe NPs were found best effective exhibiting the lowest EC 50 value calculated at 0.03 μg ai g/soil. Additionally, a fresh shoot and root weight increase was evident in tomato plants treated with CuFe NPs.

Foliar Application of Low Concentrations of Titanium Dioxide and Zinc Oxide Nanoparticles to the Common Sunflower under Field Conditions

“…Nanoparticles are also extremely useful in agriculture where they can alleviate the effects of plant diseases and are active components in nano-fertilisers [11][12][13][14][15][16][17][18]. Liu and Lal [15] classify nano-fertilisers according to the following categories: (i) macro-nutrient nano-fertilisers; (ii) micro-nutrient nano-fertilisers that include nanoparticles which are mainly oxides such as ZnO, CuO, Fe 2 O 3 , etc.…”

Enhancing catalyst stability: Immobilization of Cu–Fe catalyst in sodium alginate matrix for methyl orange removal via Fenton-like reaction

“…The peaks at 1600 and 1400 cm −1 in the spectra of alginate and X-(Cu–Fe)/Alg correspond to the vibrations of asymmetric and symmetric C– O –C, as reported [ 36 , 37 ]. Additionally, in the spectrum of bare Cu–Fe, the peaks at 1448 and 1126 cm −1 indicate metal-hydroxide (Metal-OH; Fe–OH/Cu–OH) vibrations [ 38 , 39 ], while the peaks at 883 and 788 cm −1 are attributed to iron oxide (Metal-O; Fe–O), and those at 622 and 558 cm −1 denote copper oxide (Metal-O; Cu–O) [ 40 , 41 ]. Upon investigating potential interactions in the FTIR spectra of Cu–Fe loaded into alginate by mass ratio, it was observed that high Cu–Fe loading exhibited more stretching vibration bands at 1600 and 1400 cm −1 , indicating increased polymer cross-linkage [ 42 , 43 ].…”