Using Biosynthesized Zinc Oxide Nanoparticles to Alleviate the Toxicity on Banana 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.

Investigation of TiO2 Nanoparticles Using Leaf Extracts of Lippia adoensis (Kusaayee) for Antibacterial Activity

“…Titanium dioxide (TiO2) is ahead attention by investigators in the latest past due to its exclusive characteristics and plentiful uses [3]. Grounded on the preceding literature reports, titanium dioxide nanoparticles have equipped from different plant extracts such as Azadirachta indica [4], Passiflora caeruleaa [5], aloe vera [6], Vitex trifolia [7] Trifolium pretense [8], Bauchinia tomentosa [9], Cinnamomums verum [10], Camellia sinensise [11], Artocarpuss gomezianus [12], Duranta erecta [13], and Moringa oleifera [14,15], and their antimicrobial happenings were stated.…”