In vitro Evaluation of Rhizobacteria Isolated from Different Oilseed Growing Areas against Fusarium oxysporum f.sp. ricini and Rotylenchulus reniformis Infesting Castor
Sk. Menaaz Fathima
Department of Plant Pathology, College of Agriculture, Rajendranagar, Professor Jayashankar Telangana State Agricultural University, Hyderabad, India.
K. Sankari Meena *
Indian Institute of Oilseeds Research, Professor Jayashankar Telangana State Agricultural University, Hyderabad-500030, India.
B. Vidya Sagar
Department of Plant Pathology, College of Agriculture, Rajendranagar, Professor Jayashankar Telangana State Agricultural University, Hyderabad, India.
P. Ratnakumar
Indian Institute of Oilseeds Research, Professor Jayashankar Telangana State Agricultural University, Hyderabad-500030, India.
*Author to whom correspondence should be addressed.
Abstract
A study was conducted to evaluate the efficacy of 108 rhizobacterial isolates collected from different Oilseed rhizospheres against the wilt pathogen, Fusarium oxysporum f.sp. ricini and reniform nematode, Rotylenchulus reniformis under in vitro conditions. Among the 108 isolates tested, four isolates were reported to inhibit the radial growth of Fusarium oxysporum f.sp. ricini by more than 50% and caused more than 80% of juvenile (J4) mortality of reniform nematode. The effective rhizobacterial isolates were subjected to morphological and biochemical characterization for the assessment of plant growth promoting traits and bio-control properties.
Keywords: Castor, Fusarium oxysporum f.sp. ricini, In vitro assay, rhizobacteria, Rotylenchulus reniformis