Effect of temperature and light on sporangial germination and zoospore infectivity in Sclerospora graminicola on pearl millet

    Singh, S D (1990) Effect of temperature and light on sporangial germination and zoospore infectivity in Sclerospora graminicola on pearl millet. Canadian Journal of Plant Pathology , 12 (1). pp. 25-30. ISSN 0706-0661

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    Abstract

    The effects of temp. on germination of S. graminicola sporangia (zoospore release), zoospore viability and germ tube growth, and of light and temp. on zoospore infectivity and downy mildew development in pearl millet (Pennisetum glaucum [P. americanum]) were studied. Germination of sporangia was highest at c. 30 deg C and little germination occurred after 2 h 40 min. Germ tubes grew at 15-35 deg . Zoospores retained high infectivity ( more than or equal to 70% systemic infection ) for 4 h at 30 deg C, and for a longer time at lower temp. Zoospore infectivity was not affected by light. The shortest incubation period (3 d) and the highest infectivity (66%) were obtained at 30 deg . Although both roots and shoots of young seedlings were susceptible, incidence of downy mildew was highest when both were inoculated

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Subjects: Mandate crops > Millets
    Depositing User: Mr T L Gautham
    Date Deposited: 08 Nov 2011 08:33
    Last Modified: 08 Nov 2011 08:33
    URI: http://oar.icrisat.org/id/eprint/3816
    Official URL: http://dx.doi.org/10.1080/07060669009501038
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: UNSPECIFIED
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