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Effect of maize resistance to rice black-streaked dwarf on tropism and survival of Laodelphax striatellus

LU Yin-gui1,ZHANG Li-ying2,TIAN Lanzhi1,DI Dian-ping1,MIAO Hong-qin1(1.Institute of Plant Protection,Hebei Acad.of Agri.and Forest.Sci.,IPM Center of Hebei Province,Baoding 071000,China;2.Baoding Vocational and Technical College,Baoding 071051,China)  
By inoculating rice black-streaked dwarf fijivirus(RBSDV)on 3 maize resistant inbreds(DB544,Shen137,90110) and 3 maize susceptable inbreds(Ye107,Ye478,5003) from the 1st leaf stage to the 11th leaf stages through viral vector,Laodelphax striatellus,and reading the disease incidence,it was concluded that the seedling resistance of resistant inbreds corresponded with the resistance of fully grown plant and resistance of susceptible inbreds was lower in less than 7 leave stages than 7-11 leaves stages.Furthermore,the tropism of Laodelphax striatellus to the maize inbreds and the survival capability of Laodelphax striatellus on resistant and susceptible inbreds were studied.The results indicated that there was no significant difference on the tropism and the survival capbility between resistant inbreds and susceptable inbreds.Therefore,the resistance of maize inbreds to the disease caused by RBSDV was not due to the resistance to the vector of Laodelphax striatellus.
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