relation: http://oar.icrisat.org/3816/ title: Effect of temperature and light on sporangial germination and zoospore infectivity in Sclerospora graminicola on pearl millet creator: Singh, S D subject: Millets description: 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 publisher: Canadian Phytopathological Society date: 1990 type: Article type: PeerReviewed format: application/pdf language: en identifier: http://oar.icrisat.org/3816/1/CandianJPlantPath_12_1_25-30_1990.pdf identifier: 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 relation: http://dx.doi.org/10.1080/07060669009501038