Integrated applications of aqueous leaf extract of Datura metel and chlorothalonil improved control of late leaf spot and rust of groundnut

    Kishore, G K and Pande, S (2005) Integrated applications of aqueous leaf extract of Datura metel and chlorothalonil improved control of late leaf spot and rust of groundnut. Australasian Plant Pathology, 34 (2). pp. 261-264. ISSN 1448-6032

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    Abstract

    Late leaf spot (LLS) (causal agent Phaeoisariopsis personata) and rust (causal agent Puccinia arachidis) are economically important foliar diseases of groundnut (Arachis hypogaea) and have global significance. Aqueous leaf extracts of Datura metel and Lawsonia inermis, known for their high antifungal activity against P. personata, completely inhibited the germination of urediniospores of P. arachidis in vitro. In the greenhouse, extracts of D. metel (25g/L) and L. inermis (50g/L) applied as a prophylactic spray reduced the frequency of LLS lesions and rust pustules by 65–74% compared with controls. In field studies, a programme of four sprays of D. metel leaf extract at 45, 60, 75 and 90 days after sowing (DAS) was partially effective against the foliar diseases (LLS and rust) up to 95 DAS. A single spray of chlorothalonil at 45 DAS combined with three sprays of D. metel at 60, 75 and 90 DAS effectively reduced the combined severity of LLS and rust. The increase in pod yield by this treatment (91 % over control) was comparable with the sustained application of chlorothalonil. Further validation of integrated applications of D. metel extract and chlorothalonil may reduce the dependency on fungicides in groundnut cultivation.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Subjects: Mandate crops > Groundnut
    Depositing User: Library ICRISAT
    Date Deposited: 11 Sep 2011 10:50
    Last Modified: 04 Sep 2013 12:10
    URI: http://oar.icrisat.org/id/eprint/1147
    Official URL: http://dx.doi.org/10.1071/AP05025
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: UNSPECIFIED
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