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Abstrait
Role of Antagonistic Microbe Pseudomonas fluorescens on Colletotrichum capsici Infecting Curcuma longa
Ramkumar, Soureche R, Prabhakar S and Muthuraman Pandurangan
The present study was attempted to find out the efficacy of commercially formulated Pseudomonas fluorescens in the form of foliar spray on Colletotrichum capsici infecting leaf spot disease in turmeric. The rhizomes dipped in biocontrol/chemical fungicide (bavistin) solution for overnight was planted in their respective triplicate plots for field study. 90-days old plants were sprayed with C. capsici spore spray (7-12×104 spores/ml) and subsequently on the next day by Pseudomonas fluorescens/bavistin spray in their respective plots. The second dosage of biocontrol/bavistin spray was given 15 days after the 1st biocontrol/bavistin spray. The leaf samples were collected from healthy; infected; biocontrol and bavistin sprayed plots on the 10th day after I and II spray schedule were subjected to various
biochemical analyses. The result revealed that P. fluorescens (2%) in the form of rhizome treatment as well as foliar spray (two times) was found to be best antagonistic microbe in controlling C. capsici infecting Curcuma longa. The superiority of Pseudomonas spray over bavistin was mainly due to rapid cumulative antagonistic and antibiotic action against the pathogen.