Combined use of Streptomyces sp. A6 and chemical fungicides against fusarium wilt of Cajanus cajan may reduce the dosage of fungicides required in the field

► Streptomyces sp. A6 exhibited strong tolerance towards number fungicides at concentrations higher than recommended for field applications. ► Streptomyces sp. A6 exhibited enhanced growth and mycolytic enzyme production in presence of sulfur, mancozeb, carbendazim, fosteyl aluminium and triadimefon. ► Combined application of Streptomyces sp. A6 and its culture filtrate with test fungicides was found to be more effective in controlling Fusarium infection of C. cajan compared to their individual treatments. ► Tolerance and synergistic interaction of Streptomyces sp. A6 with frequently used fungicides suggested its potential in integrated pest management.