Present investigation was conducted during 2016- 2017 in the Section of Plant Pathology, College of Agriculture, Nagpur. The experiment was laid out on growth of Blue Green Algae isolated from the rice field soil. The effect of culture medium on Blue Green Algae was recorded by using six different medium Viz. Modified Bristol’s Medium, Fogg’s Medium, BG-11 Medium, Pringsheim’s Medium, Allen and Arnon Medium and Chu’s 10 Medium. All the culture medium supported better growth of BGA. Among the six medium used Allen and Arnon Medium supported the highest growth of Blue Green Algae at 15, 30, 45 and 60 days after inoculation followed by Modified Bristol’s Medium. Whereas the Fogg’s Medium supported least growth as compared to other tested medium. | Effect of culture medium on growth of blue green algae