Abstract:

      We performed the field efficacy test of Azotobacter chroococcum YKT41 and Burkholderia vietnamiensis B418 to prove their biocontrol of eggplant rootknot nematode disease. Results show that the control efficacy of YKT41 and B418 is 72.8% and 75.6%, yield increased by 14.6% and 12.7%,under the condition of dosage employment of 2.0kg/667m2. These biocontrol agents therefore have better generalization value. Their activity depends on living microbe, and their activity sharply declines after no living microbe. Both biocontrol agents therefore must be employed within the guarantee period.

Key words: root-knot nematode disease, Azotobacter chroococcum, Burkholderia vietnamiensis, eggplant, biocontrol