The Bioscan, 3(4): 369-372, 2008
An International Quarterly Journal of Life Sciences
web site: www.thebioscan.in 
OCCURRENCE OF SPHACELIA SORGHI ON GRASS HOSTS IN KARNATAKA, INDIA
NICKY JOHNSON, SHREEKANT KARTIK, B. M. VEERABHADRASWAMY AND A. H. RAJASAB*
Mycology and Plant Pathology Laboratory,
Department of Post Graduate Studies and Research in Botany,
Gulbarga University, Gulbarga - 585 106, Karnataka, INDIA
E-mail: rajasab55@rediffmail.com

KEY WORDS
Claviceps sorghi 
Sphacelia sorghi 
Heteropogon spp. 
Sorghum ergot

Received on: 22.07.2008

Accepted on: 13.11.2008



*Corresponding
 Author

ABSTRACT

A survey was conducted during the year 1996-2007 to record the occurrence of Sphacelia sorghi on sorghum in Gulbarga district of Karnataka, India. While surveying we came across some grasses in and around sorghum fields showing ergot disease. In all about 35 sps. of wild grasses were found growing in this region. Of these only four spp. viz., Heteropogon triticeus (R.Br.)Stapf., Heteropogon contortus(L.) P.Beauv.Ex, Chrysopogon fulvus (Spreng.) Chiove. and Dicanthium annulatum (Forsk.) Stapf. showed honey dew symptoms caused by Claviceps sps. Microscopic observations of honey dew revealed the presence of macroconidia, microconidia and secondary conidia. In all the cases, production of secondary conidia was observed on the crusts of honey dew surface and they were produced iteratively from the macroconidia, Variation in size and shape was observed in Sphacelia sorghi affecting different grass sp.