Leveraging of mycogenic copper oxide nanostructures for disease management of <i>Alternaria</i> blight of <i>Brassica juncea</i>

Abstract Brassica is one of the crops sensitive to low copper supply, leading Alternaria blight. The present study reflects synthesis myco-derived oxide (M-CuO) nanoparticles (NPs) from Trichoderma asperellum and investigates their effect against blight in two soil types, alluvial calcareous. Foliar applications different treatments were used treat plants: T1 ([email protected]%), T2 ([email protected]%), T3 ( T. filtrate), T4 (M-CuO NPs), T5 chemically synthesized (C-CuO T6 bulk phase (BP-CuO @25, 50, 100, 150, 200 ppm) each twice such as protectant curative method under pot experiments. M-CuO NPs protective sprays exhibit up 75% disease suppression soil, compared 68.9% spray at ppm. Maximum seed yield number obtained, 1.95 g/plant 850 seeds/plant but calcareous (1.14 g/plant) 414 recorded plants supplemented with a protectant. In both soils, maximum plant height was increased by Thus, suggested that among foliar nanocompounds, activity shows better results activity. Among all treatments, found be most effective suppressing improving productivity growth-promoting effects .