BIOCONTROL OF POTATO CYST NEMATODE Globodera rostochiensis BY RHIZOBACTER ISOLATES ON POTATO
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Date
2014-03-24Author
Iis Nur Asyiah
Soekarto
M.Husain
Reginawanti
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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.