01902naa a2200289 a 450000100080000000500110000800800410001902200140006002400380007410000160011224500980012826000090022650001480023552009630038365000110134665000130135765000350137065300200140565300190142565300130144465300230145770000170148070000260149770000170152370000280154077300440156810501152019-10-23       2014    bl uuuu     u00u1 u    #d  a0261-21947 a10.1016/j.cropro.2014.06.0142DOI1 aFADEL, A.L.  aNavelina ISA 315bA cultivar resistant to citrus variegated chlorosis.h[electronic resource]  c2014  aArticle history: Received 28 December 2013 / Received in revised form // 12 June 2014 // Accepted 14 June 2014 // Available online 5 July 2014.  aABSTRACT.  Citrus variegated chlorosis (CVC), caused by Xylella fastidiosa, is a bacterial disease of great importance to the Brazilian citrus industry. CVC is transmitted by grafting and by leafhoppers of the Cicadellidae and Cercopidae families. There is little information about CVC tolerant sweet orange cultivars (Citrus sinensis L. Osbeck). However, previous studies have indicated some resistance to CVC in the ?Navelina ISA 315? cultivar. Based on such information, this study has been carried out to determine the resistance of ?Navelina ISA 315? to CVC observing disease symptoms in the field and in the greenhouse, associated with the presence and quantitation of X. fastidiosa in plant tissue by PCR and quantitative real time PCR (qPCR). In agreement with previous information, the results show that ?Navelina ISA 315? is resistant to CVC, on the grounds that almost no symptoms and low bacterial concentrations were found. © 2014 Elsevier Ltd.  aCITRUS  aSINTOMAS  aSUSCEPTIBILIDAD A ENFERMEDADES  aCITRUS SINENSIS  aSUSCEPTIBILITY  aSYMPTOMS  aXYLELLA FASTIDIOSA1 aSTUCHI, E.S.1 aALVES DE CARVALHO, S.1 aFEDERICI, M.1 aDELLA COLETTA-FILHO, H.  tCrop Protection, 2014gv.64, p.115-121.