Isolation and screening of Streptomyces for biocontrol potential against Rhizoctonia bataticola infection of soybean

Abstract

This study was carried out for the isolation of Streptomyces species having biocontrol potential against Rhizoctonia bataticola. R. bataticola causes many diseases in soybean. Total 21 Streptomyces were isolated from rhizospheric soil of different plants of fields in kanheri sarap. The diversity of Streptomyces was most wide in rhizospheric soil of Pomegranate. Fourteen isolates of Streptomyces exhibited zone of inhibition against R. bataticola by dual culture method. Out of fourteen, twelve isolates were isolated from soil of Pomegranate. Streptomyces ANSP2, ANSP4, ANSP12 and ANSN14 shows strong antagonistic activity against R. bataticola. These four isolates were also found compatible to Bradyrhizobium japonicum. Efficacy of ANSP4 treatment was tested on germination of soybean seed, challenged with R. bataticola. ANSP4 shows better results than chemical treated seeds.