The Morphology and Disease Cycle of Ergot Caused by Claviceps Fusiformis in Pearl Millet

Thakur, R.P. and Rao, V.P. and Williams, R.J (1984) The Morphology and Disease Cycle of Ergot Caused by Claviceps Fusiformis in Pearl Millet. Phytopathology , 74 (2). pp. 201-205.

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Abstract

Sclerotia of the pearl millet ergot pathogen, Claviceps fusiformis, germinated in moist sand in the laboratory, in potted soil in the screenhouse, and in the field. Germinating sclerotia produced one to 16 fleshy stipes each with a globular capitulum which contained pyriform perithecia. Asci contained in perithecia were long with an apical pore. Ascospores trapped on cellophane tape and greased microscope slides averaged 127.7 × 0.5 μm. Macroconidia contained in fresh honeydew were hyaline, unicellular, fusiform, and averaged 15.9 × 3.9 μm. Microconidia produced in chains from the tips of the germ tubes of macroconidia were globular, unicellular, hyaline, and averaged 5.9 × 2.5 μm. The primary disease cycle of ergot was shown to begin with airborne ascospores discharged from the germinating sclerotia and infecting pearl millet at flowering. Honeydew appeared 6- 7 days after inoculation with ascospores and contained numerous macroconidia which play an important role in secondary spread of the disease. Conidia-to-conidia cycle took 4- 6 days, and matured sclerotia were observed 20- 25 days after inoculation

Item Type:	Article
Author Affiliation:	Plant pathologist. research associate and principal pathologist. respectively. Pearl Millet improvement Program. International crop research institute for semi- arid Tropics (ICRISAT) PO: Patanchcru, AP502.124, lndia
Subjects:	Crop Improvement > Biotechnology
Divisions:	Millet
Depositing User:	Library ICRISAT-InfoSAT
Date Deposited:	04 Mar 2012 11:37
Last Modified:	04 Mar 2012 11:37
Official URL:	http://dx.doi.org/10.1094/Phyto-74-201
URI:	http://eprints.icrisat.ac.in/id/eprint/3412

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