Isolates and Chili Seeds. Five chitinolytic bacterial
isolates (BK07, BK08, BK09, LK08, KR05) were obtained
from the previous study (Irawati 2008) and F. oxysporum
was the stock collection of Laboratory of Microbiology,
Department of Biology, University of Sumatera Utara. All
bacteria were grown and maintained on modified salt