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| Enhancing Control Effect of Burkholderia vietnamiensis B418 Combined with Fosthiazate Against Cucumber Root-knot Nematode（Meloidogyne incognita） |
| HU Jindong，WEI Yanli，WANG Yilian，LIU Baojun，LI Jishun* |
| Ecology Institute，Qilu University of Technology（Shandong Academy of Sciences），Shandong Provincial Key Laboratory of Applied Microbiology，Jinan 250103，Shandong，China |
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Abstract Root-knot nematode（RKN）is one of the important diseases seriously affecting vegetable production in China．This study improved the design of RKN plot experiment，and divided the experimental fields into 3 types：nematode mild，moderate，and severe，according to RKNs number in the soil．Then rerandomize was carried out within blocks to overcome the result bias of direct random permutation．The results showed that in the process of controlling cucumber nematode，matching up Burkholderia viennensis B418 with fosthiazate for soil treatment could obviously reduce the disease index of cucumber RKNs，and improve the control efficacy of fosthiazate against cucumber RKNs．105 days after field planting，the control efficacy was significantly higher than that by single treatment of fosthiazate．The average efficacy in 3 types of mild， moderate，and severe plots had reached 63.99%．At the same time，plant root system development was promoted，yield was remarkably increased，and a synergistic effect was realized．
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Received: 28 June 2021
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