Assessment of gardening growing media suppressiveness against Rhizoctonia damping-off disease

In the present study the suppressive capability was assessed of four commercial peat- based growing media against Rhizoctonia solani on Lepidium sativum. For all organic media, 12 parameters were measured including phytotoxicity, enzymatic activities (glucanase, N- acetylglucosaminidase, chitobiosid...

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Bibliographic Details
Published in:Journal of plant pathology 2013-07, Vol.95 (2), p.401-405
Main Authors: Pane, C, Chiantese, C, Scala, F, Bonanomi, G
Format: Article
Language:English
Subjects:
autoclaving
bacteria
correlation
damping off
disease control
enzyme activity
fungi
gardening
Growing media
Home gardening
hydrolysis
Lepidium sativum
Organic foods
pathogens
Peat
Phytopathology
Phytotoxicity
Plant diseases
Rhizoctonia
Short Communication
Soil biology
Soil quality
Thanatephorus cucumeris
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Summary:In the present study the suppressive capability was assessed of four commercial peat- based growing media against Rhizoctonia solani on Lepidium sativum. For all organic media, 12 parameters were measured including phytotoxicity, enzymatic activities (glucanase, N- acetylglucosaminidase, chitobiosidase, endochitinase and hydrolysis of fluorescein diacetate), microbiological (culturable bacteria, pseudomonads and fungi) and chemical features (pH, EC and total protein). Three out of all media showed a significant disease suppression, while one was very conducive to disease development. Autoclaving growing media largely decreased or eliminated disease suppressiveness, suggesting that microbes play a vital role. In vitro tests showed a reduction in pathogen suppression when filter-sterilized extracts from the growing media were used. Moreover, disease suppressiveness were positively correlated with EC, supporting the hypothesis of a possible role of physical, other than biological factors, in R. solani control. Our results demonstrate that some peat-based growing media could be useful for the control of soil-borne pathogens.
ISSN:1125-4653
2239-7264