Enhancement of downy mildew of sorghum by some organic soil amendments: A caution to organic farmers

Singh, H. and Ravikumar, M. C. and Garampalli, R. H. (2013) Enhancement of downy mildew of sorghum by some organic soil amendments: A caution to organic farmers. Archives of Phytopathology and Plant Protection, 46 (9). pp. 1030-1035. ISSN 1477-2906

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Official URL: http://doi.org/10.1080/03235408.2012.756191

Abstract

Matured botanical compost of Croton sparsiflorus and Azadirachta indica were evaluated for promotion of sorghum downy mildew at the rate of 0.5% (w/w). Exceptionally high promotional rates of 26.9% (C. sparsiflorus) and 30.1% (A. indica) were observed as compared to negative control (8.8%). The enhancement of disease was higher than that obtained by the supply of recommended dose of urea (13.3%). As the pathogen (Peronosclerospora sorghi) is a biotroph and cannot multiply by using organics as nutrient source in the absence of a host, the mechanism of disease enhancement is inferred to be through stimulation of oospore germination by organic compounds.

Item Type: Article
Uncontrolled Keywords: Azadirachta indica, Peronosclerospora sorghi, Peronosporaceae
Subjects: B Life Science > Botany
Divisions: Department of > Botany
Depositing User: Arshiya Kousar
Date Deposited: 12 Nov 2019 06:13
Last Modified: 12 Nov 2019 06:13
URI: http://eprints.uni-mysore.ac.in/id/eprint/9620

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