Fig. 7

Greenhouse grown plants naturally infected with Oidium neolycopersici: (a, d) Sprayed plants with the PVP-AgNPs formulation displaying no symptoms and no apparent fungi infection, (b, c) Nontreated plants showing severe fungal attack and disease symptoms. Light microscopy showing (e) normal fungal cells from individualized tomato leaves treated with water and (f) fungal cells from individualized infected leaves treated with the PVP-AgNPs solution showing damaged cells with white arrows.