EPS Rich floccugated culture of Pseudomonas for the enhancement of growth and effective Biocontrol against Pyricularia oryzae of Rice Var. (ADT-36)
*P. Manikandan and S. Kalaiarasu
Department of Microbiology, Faculty of Agriculture, Annamalai University, Annamalai Nagar-608002 (India)
ABSTRACT
A study was conducted by using different concentrations of purified exopolysaccharides (EPS) viz., 100, 200, 300 ppm on the blast disease incidence of rice revealed that the application of the same at 200 ppm concentration could effectively controlled the disease incidence to a higher level when compared to other concentration. The results also reflected the dual effect of Pseudomonas exopolysaccharides on the enhancement of host plant growth as well as the bio-control against Pyricularia oryzae whereas the application of Induced Systemic Resistance inducing chemicals confined with reduction in blast disease incidence. Interestingly the Pseudomonas exopolysaccharides at a concentration of 200 ppm level could be optimized as effective one for the control of blast disease in lowland rice.