Biocontrol of
potato cyst nematode Globodera
rostochiensis was studied on potato using three isolates of rhizobacter
from Banjarnegara (Pseudomonas diminuta,
Bacillus alvei, Bacillus
stearothermophilus). In a greenhouse experiment, all
three isolates of rhizobacter not affect plant height, root and tuber weight
but significantly increased root length and significantly reduced the number of cyst formed. Rhizobacter
isolates were tested for siderophores, cytokinin and giberellic acid production.
All three isolates of rhizobacter produced cytokinin and giberellic acid but
didn’t produce siderophores on Chrome-Azurol Sulphonate (CAS). This study
suggests that Pseudomonas diminuta, Bacillus alvei, and Bacillus stearothermophilus may be used for the biocontrol of G. rostochiensis on potato. Mode of
action of this isolates through cytokinin and giberellic acid production.
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