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| Preliminary Report about Using 4 Chemical Inducers to Control Cucumber green mottle mosaic virus Disease |
| LI Jun-xiang，GU Qin-sheng* |
| （Zhengzhou Fruit Research Institute，Chinese Academy of Agricultural Sciences，Zhengzhou 450009，Henan，China） |
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Abstract In order to screen the chemicals，which could induce resistance to CGMMV in bottle gourd 〔Lagenaria siceraria（ Molina） Standl.〕，2,1,3-Benzothiodiazole（ BTH），Brassinolide（ BL），Chitosan Oligosaccharide（ CTS） and Salicylic Acid（ SA），were applied to bottle gourd seedlings to test their induced resistance in this experiment. BTH，BL，CTS and SA were sprayed before the plants were inoculated with CGMMV.
Their relative control effects were evaluated.The results showed that 3 days before innoculation，treatments with BTH（ 0.050 g·L-1），BL（ 5.0×10-5 g·L-1），CTS（1.0 g·L-1），SA（ 0.138 g·L-1 ） could significantly reduce the disease indexes. Among them，5.0×10-5 g · L-1had the best control effect，reaching 70.38%. Further studies indicated that after spraying BL，CTS，SA，3 days was the optimum inducing time，while after spraying BTH，
the optimum inducing time was 1 day.Those 4 chemicals all showed potentials in inducing bottle gourd to produce resistance to CGMMV. Their differences in resistance were related with inducers and inducing times.
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Received: 03 November 2014
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