A novel technique for greenhouse evaluation of plant extracts for management of downy mildew of sorghum

Singh, H. and Garampalli, Rajkumar H. (2013) A novel technique for greenhouse evaluation of plant extracts for management of downy mildew of sorghum. Archives of Phytopathology and Plant Protection, 46 (16). pp. 1984-1992. ISSN 1477-2906

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Official URL: http://doi.org/10.1080/03235408.2013.782645

Abstract

Antipathogenic potential of 16 plants was evaluated in the form of aqueous extracts against Peronosclerospora sorghi, causing downy mildew of sorghum. A novel method was developed in which conidial suspension and plant extracts were mixed individually and allowed to stand for 5 min and then used to inoculate the host by sprout-dip method. The sprouts thus inoculated were grown in pots, and disease incidence was observed. Three extracts (Parthenium hysterophorus, Duranta repens and Oxalis latifolia) suppressed the disease at par with chemical fungicide (Mancozeb 75%). In form of spray, D. repens extract with tween-20 adjuvant (1.9% disease) performed closest behind mancozeb (0% disease), while negative control showed 21% disease incidence. Organic management of airborne inoculum of downy mildew of sorghum is feasible and preferable as compared to the use of chemical fungicides, considering human and environmental health concerns. Use of water extract keeps the technology simple so that it can be directly prepared and used by farmers. Short listing of three most effective water extracts would help in self-reliance of farmers, reducing their dependence on commercial products.

Item Type: Article
Uncontrolled Keywords: Peronosclerospora sorghi, Peronosporaceae, Oxalis, Oxalis latifolia, Duranta, Duranta erecta, Parthenium, Parthenium hysterophorus
Subjects: B Life Science > Botany
Divisions: Department of > Botany
Depositing User: Arshiya Kousar Library Assistant
Date Deposited: 26 Nov 2019 06:19
Last Modified: 16 Jul 2022 10:04
URI: http://eprints.uni-mysore.ac.in/id/eprint/9548

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