Using Biosynthesized Zinc Oxide Nanoparticles as a Pesticide to Alleviate the Toxicity on Banana Infested with Parasitic-Nematode

Abstract

We appraised the use of zinc oxide nanoparticles, (ZnO-NPs) and zinc oxide bulk (ZnO-bulk) or zinc acetate, as a natural nematocide, alone or in combination with oxamyl in vitro and in vivo trials in order to improve systems for root-knot nematode (RKNs) control in banana plants. Especially, ZnO-NPs were biosynthesized from the alga, Ulva fasciata. In general, all applications of ZnO-NPs were more effective to control RKNs than ZnO-bulk as well oxamyl alone (chemical control). In in vitro conditions, ZnO-NPs with oxamyl showed 98.91% second stage juveniles2 (J2s) mortality of Meloidogyne incognita after 72 hrs, while 72.86% mortality was observed at the same NPs treatment without oxamyl at the same exposure time. The same treatment was the most effective in diminution of J2s community (82.77%) in soil and galls number (81.87%) in roots under in vivo conditions. In contrast, the highest weight and height of the shoot was observed in Zn-bulk treatment in combination with oxamyl as well oxamyl only (nematocides check). Scanning electron microscopy (SEM) reports displayed the distributions and accumulations of ZnO-NPs on the nematode (J2s) body under direct exposure, which might be the reason of NP-mediated toxicity and disruption for M. incognita. HighlightsZno-NPs biosynthesis by macrogreen alga Ulva fasciata and give nanorode particles. Biogenic ZnO-NPs were used as nematocidal against root-knot nematodes (RKNs) solely and in combination with oxamly in vitroand in vivo.ZnO-NPs exhibited high nematocidal activity in vitroand in vivo.Banana plants infected with RKNs and treated with ZnO-NPs in combination with oxamly showed high growth. Statement Of NoveltyThis study offers importance of green technology for the development of biosynthesis ZnO-NPs, and in combinations with oxamyl in control RKNs (in vivo and in vitro). Moreover, it is possible using biosynthesis ZnO-NPs in alternative to pesticide and also to enhancement the plant yields. nematode body with magni cation 500x, f) ZnO-NPs attached to the nematode body with magni cation 1500x.

Polymeric Droplets on SiO2 Nanoparticles through Wastewater Treatment of Carbon‐Based Contaminants in Photocatalytic Degradation

“…As the concentration of SA increases, the enlargement (%) increases, and gelation (%) increases while transfiguration increases for samples 1 and 2. The decreases at sample 3 then increase at sample 4 [49,50].…”

Grass-Shaped Zinc Oxide Nanoparticles Synthesized by the Sol-Gel Process and Their Antagonistic Properties towards the Biotrophic Parasite, Meloidogyne incognita

“…Te mechanism of action of Ag-NPs is related to the disruption and dysfunction of various cellular systems in both eukaryotic and prokaryotic cells, including membrane permeability, ATP generation, and physiological response to oxidative stress [47,54]. Algae-synthesized ZnO NPs demonstrated their positive efect on RKN management and nematode community suppression in soil and roots and may contribute in the suppression of M. incognita and have a signifcant impact on banana health [15]. When utilized to suppress the nematode infection of M. incognita, green-producedG-ZnO NPs had no plant phototoxicity.…”

“…Keeping the harmful efects of chemical pesticides in mind, researchers focusing on alternative cost-efective, environmentally friendly, and safe options for controlling pests and diseases, including nematodes disease, have become a concern. Sustainable options, such as benefcial microorganisms, biopesticides, natural plant products, and biocompatible nanopesticides were used to combat pests and diseases, such as root-knot nematodes [10][11][12][13][14][15]. Nanotechnology is a multidisciplinary feld of study that has the potential to transform the agricultural landscape in terms of plant disease control, pathogen recognition, and pesticide degradation [6,16].…”