Colloidal Silver Hydrogen Peroxide: New Generation Molecule for Management of Phytopathogens

• Published in: Horticulturae Vol. 7; no. 12; p. 573
• Main Authors: Mahesha, Hosapura Shekhararaju, Vinay, Jayasuvarnapura Umapathi, Ravikumar, Medikeripura Rekhyanaik, Visweswarashastry, Suryanarayana, Keerthi, Manikyanahalli Chandrashekhara, Halli, Hanamant Mudakappa, Shokralla, Shadi, El-Abedin, Tarek K. Zin, Mahmoud, Eman A., Elansary, Hosam O.
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-12-2021
• Subjects: Abiotic stress; antibacterial; Antibacterial activity; Antibiotics; Antimicrobial activity; Antimicrobial agents; Bacteria; colloid; Colloids; Crop diseases; Crop production; Fungi; Fungicides; Glucose; Hydrogen peroxide; Necrosis; Particle size; Pathogens; Pesticides; Phytotoxicity; Plant bacterial diseases; Plant diseases; Productivity; Silver; silver hydrogen peroxide; Soil microorganisms; soil-borne pathogens; streptocycline; India
• ISSN: 2311-7524; 2311-7524
• DOI: 10.3390/horticulturae7120573

Plant pathogenic fungi and bacteria are a significant threat to global commercial crop production resulting in increased cost of production, reduced crop establishment and productivity. An effort was made to study the antimicrobial activity of silver hydrogen peroxide (SHP) against selected plant pathogenic fungi and bacteria under in vitro conditions. Higher antibacterial activity of SHP was observed against Xanthomonas axonopodis pv. citri (Xac; 39.67 mm), Xanthomonas citri pv. punicae (Xap; 39.00 mm), and Ralstonia solanacearum (Rs; 36.67 mm) at 500 ppm concentration. SHP was superior to streptocycline (500 ppm) against Xac (25.33 mm) and Xcp (22.67 mm) at 100 ppm. The soil-borne fungi viz., Pythium aphanidermatum and Fusarium solani failed to initiate mycelium growth on PDA at the concentration of 5000 ppm and above. The average size of SHP particles was 462 nm in diameter, and 73.40% of particles had the size of 378 nm, which reflects the particles present in SHP solution in the form of colloids. The effective doses (100–5000 ppm) did not show any phytotoxicity symptoms in plants, while leaf necrosis was noticed at 10,000 ppm after four days of application. SHP (≤5000 ppm) can be used to effectively manage both fungal and bacterial plant pathogens by a single application. Further field studies need to be conducted for validation and commercial use of SHP.