Abstract:

In order to improve the control effect of Burkholderia vietnamiensis and its composite microbial flora on rootknot nematode in vegetables, taking the cucumber rootknot nematode as the research object, we adopted the way of adding nutrient matrix, biobacteria fertilizer and microbial antimicrobial agents when cultivating land, and fertilizing microbial antimicrobial agents when transplanting, carried out research for application technology on Burkholderia vietnamiensis B418 and its combinations with Bacillus cereus BCJB01, Trichoderma spp.LTR-2 and T11-W. The results showed that the addition of nutrient substrate when cultivating land could significantly improve the control effect of B418 to rootknot nematode. In the treatment of composite microbial flora, the treatment of cucumber rootknot nematode by adding bio-bacteria fertilizer and nutrient matrix at the same time when cultivating land was better than that of single nutrition matrix or bio-fertilizer. B418 single agent add nutrient matrix treatment was superior to its composite microbial flora add nutrition matrix treatment, whose field control effectiveness was 90.05%.

Key words: Burkholderia vietnamiensis , Trichoderma spp., biological control, Bacillus cereus, Meloidogyne spp.