Engineered green nanoparticles interact withNigrospora oryzaeisolated from infected leaves ofArachis hypogaea

Abstract

Oilseed crop diseases are a major concern around the world, particularly in India. The synthetic fungicides not only kill the pathogen, but they also harm the host plant and beneficial microbes and on continuous usage, they decrease the soil fertility. To overcome this problem, green nanotechnology has been a greater alternative with promising benefits. The green synthesized nanoparticles from the extract of various plant parts are an effective remedy for killing the pathogens without affecting the host plants and the environment. Hence, in our study silver nanoparticles were synthesized from Fennel seed (Foeniculum vulgare) extract. The synthesis of nanoparticles was confirmed using UV-vis, Fourier transform infrared, dynamic light scattering, zeta potential, and scanning electron microscopic analysis. The in vitro antifungal study was carried out and revealed that the nanoparticles had high efficacy against the isolated phytopathogen Nigrospora oryzae which causes tikka disease in Arachis hypogaea plants. Hence, F. vulgare seed nanoparticles can be used as an effective alternative to synthetic fungicides without causing any deleterious effect on soil microflora or the environment.

Nigrospora oryzae Causing Leaf Spot Disease on Chrysanthemum × morifolium Ramat and Screening of Its Potential Antagonistic Bacteria

“…N. oryzae and N. sphaerica can often infect the same species of plant, such as Arachis hypogaea and Vaccinium corymbosum [ 49 , 50 , 51 , 52 ]. As for chrysanthemums, a widespread disease caused by N. sphaerica has been found in chrysanthemum growing areas [ 53 ], and in this study we found that N. oryzae is also a pathogen of chrysanthemum.…”