부산대학교 도서관

The impact of zinc oxide nanoparticles (ZnO NPs) in 100 and 200 mg L −1 concentrations was examined on the hatchingand mortality of M. incognita (Mi) and the growth of P. betavasculorum (Pb) and R. solani (Rs) under in vitro conditions. ZnO NPs inhibited the hatching and caused mortality of 2nd stage juveniles (J2s) of Mi and also inhibited the growth ofPb and Rs. In pot experiments, ZnO NPs in 100 and 200 mg L −1 concentrations were delivered as a foliar spray and seedpriming for the management of disease complex of beetroot. Foliar spray of ZnO NPs to plants infected with pathogens orun-infected more effi ciently improved plant dry mass and physiological and biochemical parameters of beetroot than seedpriming. Foliar spray of ZnO NPs at 200 mg L −1 to plants infected with pathogens resulted in the greatest increase in plantdry mass, and physiological and biochemical parameters of beetroot. Seed priming and foliar spray of ZnO NPs causeda reduction in disease indices, nematode population, and root galling. Foliar spray of ZnO NPs at 200 mg L −1 caused themaximum reduction in disease indices, nematode multiplication, and root galling. The inductively coupled plasma massspectrometry (ICP-MS) analysis revealed that ZnO NPs were accumulated in shoots and roots of both infected and uninfectedplants independent of the application methodology. Overall, the fi ndings suggest that ZnO NPs as the foliar spray has thepotential for the management of root-knot, soft-rot, and root-rot, disease complex of beetroot.