A repeatable method of germination of oospores of Sclerospora graminicola and its significance in downy mildew disease

Panchbai, S D and Reddy, M S and Singh, S D (1991) A repeatable method of germination of oospores of Sclerospora graminicola and its significance in downy mildew disease. Indian Journal of Plant Protection, 19 (1). pp. 101-103. ISSN 0253-4355

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Abstract

Pearl millet (Pennisetum glaucum [P. americanum]) leaves bearing S. graminicola oospores were ground and soaked in water for 9 h, drained, and the oospores then suspended in sodium hypochlorite (NaOCl) for 12 h in the dark. Spores were resuspended in water, and incubated for germination at 25°C. Although germination was observed after 1 h of NaOCl treatment, max. germination occurred after 12 h. Oospores remained viable for up to 13 years, but max. germination (76%) occurred with 1 year old spores, and decreased to <10% for 6 year old spores. Oospore-concn also influenced germination; 40% germination occurred at 0.2 mg oospores/10 ml water, increased to 60% in 2 mg oospores/10 ml water and then decreased, with little or no germination at 14 mg/10 ml. Opt. temp. for germination was 25°C. The implication of these results is discussed.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Subjects:	Mandate crops > Millets Others > Agriculture-Farming, Production, Technology, Economics Others > Entomology
Depositing User:	Library ICRISAT
Date Deposited:	15 Dec 2011 12:42
Last Modified:	15 Dec 2011 12:42
URI:	http://oar.icrisat.org/id/eprint/4978
Official URL:
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	UNSPECIFIED
Links:	Author

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