Evaluation of uncomposted botanical-based soil amendments for organic management of downy mildew of Sorghum

Uncomposted dried, powdered biomass of 38 selected botanicals was evaluated as soil amendments in a pot experiment for their potential to suppress downy mildew of sorghum caused by soil-borne oosporic inoculum of Perenosclerospora sorghi. A negative control showed 11.1% disease incidence. Six botani...

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Bibliographic Details
Published in:Archiv für Phytopathologie und Pflanzenschutz 2013-03, Vol.46 (5), p.599-606
Main Authors: Singh, Heminder, Garampalli, Rajkumar H
Format: Article
Language:English
Subjects:
Allium cepa
Biomass
Composting
Composts
Crop diseases
disease control
disease incidence
Downy mildew
Eucalyptus globulus
Hyptis suaveolens
Infection
Inoculum
Lantana camara
Nerium oleander
Oospores
organic management
Peronosclerospora
Plant protection
Polyalthia
Powder
powders
Shelf life
Soil amendment
soil amendments
Sorghum
Sorghum (Poaceae)
uncomposted
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Summary:Uncomposted dried, powdered biomass of 38 selected botanicals was evaluated as soil amendments in a pot experiment for their potential to suppress downy mildew of sorghum caused by soil-borne oosporic inoculum of Perenosclerospora sorghi. A negative control showed 11.1% disease incidence. Six botanicals proved effective in form of dry biomass powder at 0.5% (w/w) amendment rate to control infection by oospores (Allium cepa 0%, Lantana camara 1.6%, Polyalthia longofolia 0%, Hyptis suaveolens 1.5%, Eucalyptus globulus 0% and Nerium oleander 1.6% of disease incidence). Dry powders are not only effective in disease suppression but confer additional benefits over composts like reduced bulk, increased shelf-life, consistent composition and results.
ISSN:1477-2906
0323-5408
1477-2906
DOI:10.1080/03235408.2012.749693