Compost amendments enhance peat suppressiveness to Pythium ultimum, Rhizoctonia solani and Sclerotinia minor

Content Provider	Semantic Scholar
Author	Pane, Catello Spaccini, Riccardo Piccolo, Alessandro Scala, F. Della Bonanomi, Giuliano
Copyright Year	2011
Abstract	Peat is the most common organic material used for the preparation of potting mix because of its homoge- neous and favorable agronomic characteristics. However, this organic material is poorly suppressive against soilborne pathogens and fungicides are routinely used to manage damping-off diseases. In the present study, we investigated the suppressive capability of five compost - peat mixtures towards the plant pathogens Pythium ultimum, Rhizoctonia solani and Sclerotinia minor - Lepidium sativum pathosystems. For all organic media, 18 parameters were measured including enzymatic activities (glucanase, N-acetyl- glucosaminidase, chitobiosidase and hydrolysis of fluorescein diacetate), microbiological (BIOLOG Eco- Plates™, culturable bacteria and fungi), and chemical features (pH, EC, total, extractable and humic carbon, total and organic N, NH4-N, total protein and water content). In addition, 13 C-CPMAS-NMR spectroscopy was used to characterize the organic materials. Peat amended with composts reduced disease damping- off caused by P. ultimum, R. solani and S. minor in 60% of the mixtures and compost derived from animal man- ure showed the largest and most consistent disease suppression. Sterilization decreased or eliminated sup- pressiveness of 42.8% of the mixtures. The most useful parameters to predict disease suppression were different for each pathogen: extractable carbon, O-aryl C and C/N ratio for P. ultimum, alkyl/O-alkyl ratio, N-acetyl-glucosaminidase and chitobiosidase enzymatic activities for R. solani and EC for S. minor. Our results demonstrate that the addition of composts to peat could be useful for the control of soilborne pathogens.
Starting Page	115
Ending Page	124
Page Count	10
File Format	PDF HTM / HTML
DOI	10.1016/j.biocontrol.2010.10.002
Volume Number	56
Alternate Webpage(s)	http://www.suprahumic.unina.it/home/images/pdf/2011_bc_giuliano.pdf
Alternate Webpage(s)	http://www.ecoap.unina.it/doc/staff/giuliano_bonanomi/Compost%20amendments%20enhance%20peat%20suppressiveness%20to%20pathogens.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.biocontrol.2010.10.002
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article