Effects of rice dwarf virus on feeding and oviposition preference of Nephotettix cincticeps(Uhler)(Hemiptera:Cicadellidae)
Rice dwarf virus(RDV)is the pathogeny of rice dwarf virus disease.It is mainly transmitted by green rice leafhopper(GRLH),Nephotettix cincticeps(Uhler)(Hemiptera:Cicadellidae),in a persistent-propagative manner and is transovarially transmitted to offspring.Host plant selection preference for feeding and oviposition of non-viruliferous or viruliferous(carrying RDV)GRLHs between RDV-free and RDV-infected plants were tested through laboratory experiment.In the host plant feeding selection bioassay,more non-viruliferous GRLHs were attracted to RDV-infected rice plants,reaching a significant difference level from the 8 h after inoculation.More viruliferous GRLHs preferred to located on RDV-free rice plant for feeding,with the differences at significant level at 24 h after inoculation.These results indicated that RDV could altering their vector's host plant feeding selection preference.In the host oviposition preference bioassay,there were no significant differences in the three parameters(No.of egg mass/plant,egg number/egg mass and total No.of egg/plant)between RDV-free and RDV-infected rice plants,which indicated that RDV posing a negligible risk to GRLH oviposition preference.In this study,the effects of RDV on GRLHs host plant selection for feeding and oviposition were preliminarily clarified.We expect to providing evidence for reveal the mechanism within the tritrophic relationship.
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