Role of antagonistic microbe Pseudomonas fluorescens on Peronospora arborescens infecting Papaver somniferum

Abstract

The present study was attempted to find out the efficacy of commercially formulated Pseudomonas fluorescens in the form of foliar spray on Peronospora arborescens causing downy mildew disease in opium poppy. The seed dipped in bioagents and metalaxyl solution for 30 minutes was sown in their respective triplicate plots for field study. 30 days old plants were sprayed with P. arborescens spore collected from infected plants of opium poppy and subsequently on the next day by Pseudomonas fluorecsens and metalaxyl spray in their respective plots. The second spray was done 15 days after first spray. The leaf sample was collected from healthy, infected and treated plots for disease rating and biochemical analysis. The result revealed that Pseudomonas fluorescens was found effective treatments for management of downy mildew in opium poppy due to rapid cumulative antagonistic effect and antibiotic action against the pathogen.