| dc.description.abstract | Basal stem rot (BSR) is the most serious disease of palm oil that caused by Ganoderma boninense Pat. The objectives of these researches were to find chitinase-producing bacterial which inhibit G.boninense growth and to determine the relationship between mycorrhizal and chitinolytic bacterial in controlling the BSR. The experimenthals were conducted in laboratory, secreen house dan fields. The research activities were: (i) exploration of chitinolytic bacterial as antagonistic agents of pathogens (ii) evaluate the pathogenicity, index chitinolitic of the chitinolytic bacterial and their antagonism effect against G. boninense, (iii) study on the application of chitinolytic bacterial and AMF in controlling the oil palm BSR through split plot experimenthal design. There were seven isolate B13, B14, B16, B42, Al11, TB41 and L34 have been selected as the best chitinolase-producing bacterial and they were not pathogenic to plants. The study showed that selected bacterial have differences on chitinolytic index. All of them suppressed the growth of G. boninense above 95% in vitro antagonism test using dual culture method on liquid media. However the antagonism test on PDA only isolate of AL11, TB41 and L34 had higher antagonism capacity against the pathogen. The severity of basal stem rot that expressed by the root necrotics were reducted since the oil palm seedling showed high degrees of mycorrhizal root colonization. The application of combination of chitinolytic bacterial and AMF suppressed the disease severity (95%) higher compare to the single one (55% - 7 | en |
