Biological control of soil-borne phytopathogenic fungi through onion waste composting: implications for circular economy perspective

• DOI: 10.1007/s13762-021-03561-2
• Publication Date: 2021-07-29T13:02:44Z
• Authors: A. Chorolque; G. Pellejero; M. C. Sosa; J. Palacios; G. Aschkar; C. García-Delgado; R. Jiménez-Ballesta
• Keywords: Aspergillus niger; Cow dung; Biodegradable waste; Green waste

Abstract The production of onion waste derived mainly from bulbs affected by fungal diseases, during classification and storage presents an important agro-environmental issue in regions. Composting is environmentally friendly strategy to recycle agricultural produce organic fertilizers. Modifications the microbial community soil can affect ability pathogen propagules survive, germinate infect plant roots. Hence, main objective this work was exploring mechanisms involved on presence three soil-borne phytopathogenic fungi composting process under hypothesis if that resulting compost effectively prevents or minimizes dispersion fungi. To end, piles 60 tonnes each were built layering cow dung at 1:1 ratio. Temperature, moisture, pH, electrical conductivity (EC) Aspergillus niger , Penicillium sp. Fusarium growth monitored for 100 days. During first 28 days composting, increased significantly showing thereafter a downward trend. Final estimations populations densities indicated predominance A. effective reduction abundance This pilot-scale demonstrates feasibility contaminated with highlights positive environmental impact associated practice. Therefore, feasible sustainable procedure promote circular economy