EFFECTIVITY OF BACILLUS CEREUS TO CONTROL RALSTONIA SYZYGII SUBSP. INDONESIENSIS AND GROWTH PROMOTING OF CHILI PEPPER

Abstract

Four Bacillus cereus isolates acquired from previous studies have good biocontrol and plant growth-promoting activity in plants. This study purposes to acquire best Bacillus cereus which has the ability to control Ralstonia syzygii subsp. indonesiensis and plant growth promoting activity on fields. Research was conducted in Alahan Panjang, Solok District, West Sumatera, Indonesia. It used Complete Randomized Design with three replications. Parameters observed are disease development (Symptom, severity), growth development (germination rate, plant height, number of leaves, root length) and generative phase (Time of flowering and yields). Result showed that indigenous rhizobacterial isolates have varied ability to control pathogen and promote growth. All B. cereus persist in moderate density after 30 week introduction and have the ability to control disease development and reduce the symptom appearance of Bacillus cereus Strain JN233 have the ability to control R. syzygii subsp. indonesiensis and have best ability to promote growth rate of pepper.