Compatibility Bacillus subtilis (BS 16) with fungicides used in chilli ecosystem for integrated disease management

Abstract

Rhizosphere bacteria are one of the most potential biocontrol agents in plant disease management. Among them, Bacillus subtilis have advantages over other bacteria because of their ability to form endospore and broad spectrum antibiotic activities. The potential isolates of B. subtilis are identified on basis of bioefficacy and shelf. The population of B. subtilis (BS16) was significantly higher in talc powder (1.8×108cfu/g). The isolate B. subtilis (BS16) was studied for compatibility with commonly used fungicides of chilli ecosystem at four different concentrations, Among six fungicides, carbendazim 50 WP showed least zone of inhibition (15.03 mm) at 0.3 % and Tricyclazole 18 % + Mancozeb 62 % WP showed highest zone of inhibition (23.13 mm) at 0.3 %. It is concluded that carbendazim 50 WP is more compatible with B. subtilis compared to others fungicides. Hence B. subtilis (BS16) used as one of the component in integrated disease management.