Green nanotechnology: Synthesis, characterization of silver and copper nanoparticles and their efficacy against major pathogens of maize and pomegranate

Authors

  • V.B. NARGUND*, CHIKKANNA SWAMY, MADHU S. GIRI, HULAGAPPA and H. RAMANAGOUDA

Keywords:

Atomic Force Microscope, green nanotechnology, pomegranate bacterial blight, silver and copper nanoparticles

Abstract

Green nanotechnology is a new promising field in agricultural sciences to solve the problems in crop production and crop protection. Green synthesis of silver and copper nanoparticles (AgNPs and CuNPs respectively) from seed extracts of Glycine max (soybean), Thevetia peruviana (yellow oleander) and flower bud extract of Syzygium aromaticum (cloves) was attempted by photo induced and autoclaving method. Change in colour from colourless to dark orange/brown is preliminary confirmation of synthesis of nanoparticles. Further nanoparticles were characterized by using UV-Visible spectrophotometer (absorption spectra of AgNPs were at 415-425 nm and CuNPs at 285 nm). By use of Atomic Force Microscope size ranged from 50-200 nm and particle height was 5.5-45.3 nm. Efficacy of these newly synthesized AgNPs were tested against Curvularia lunata (Leaf spot of maize) which showed 95.00 per cent spore inhibition and Xanthomonas axonopodis pv. punicae (bacterial blight of pomegranate) was less inhibition (9.25 mm) compared to the AgNO3 bulk (12.50 mm) and streptocycline (11.50 mm) but CuNPs did not show any significant inhibition against Exserohilum turcicum.

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Issue

Vol. 69 No. 4s (2016): Indian Phytopathology : Special Issue

Section

Research Articles

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How to Cite

MADHU S. GIRI, HULAGAPPA and H. RAMANAGOUDA, V. N. C. S. (2016). Green nanotechnology: Synthesis, characterization of silver and copper nanoparticles and their efficacy against major pathogens of maize and pomegranate. Indian Phytopathology, 69(4s), 598-601. http://epubs.icar.org.in/ejournal/index.php/IPPJ/article/view/71402