Response of Chickpea (Cicer arietinum L.) Genotypes against Collar Rot Disease Caused by Sclerotium rolfsii Sacc.

Aims: Collar rot is a fast spreading and destructive disease becoming more serious at seedling stage causing collar region especially in area where paddy based cropping system followed. Lack of sources resistant present cultivar against Sclerotium rolfsii cause threat to chickpea production. Therefore, the study was carried out evaluate genotypes S. identification for further breeding program.
 Study Design: Randomized Block Design (RBD) with two replications were used.
 Place Duration Study: Regional Rice Research Station, Navsari Agricultural University, Vyara, between October 2019 April 2020.
 Methodology: Pathogen isolated from infected plant by directly transfer sclerotia bits on potato dextrose agar (PDA) medium. After purification, pathogen identified observed colony character formation. The morphological characters viz., mycelial growth characteristic studied under high power magnification (40X) formation, shape colour low (10X) 10 days old culture. 39 used studies. A field experiment conducted during Rabi -2019-20 season. inoculum thoroughly broadcasted soil @ 10g/ row. Germination per cent incidence observed.
 Results: Chickpea (Cicer arietinum L.) caused Sacc. exhibited initial white fluffy mycelium appearance Microscopic view hyaline, branching, compact septate had clamp connection. White formed after 4th incubation later within it became mature changed brown dark brown. Sclerotia appeared shiny due presence gummy material. Out only five GJG-1713, GG-6, GJG-1509, Phule Vikram JGK-1 as moderate inoculums inoculated rice fellow system.
 Conclusion: showed reaction rolfsii.