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List of 12 southeastern US varieties (with the exception of Roucaneuf) reported to be Pierce’s disease (PD) resistant based on the survival rate and visual symptoms of leaf scorch under natural disease pressure in the field.

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posted on 18.12.2020, 18:44 by Summaira Riaz, Alan C. Tenscher, Claire C. Heinitz, Karla G. Huerta-Acosta, M. Andrew Walker

The two italicized and bolded accessions are reference plants, included in every greenhouse screening experiment. The other ten accessions were tested in earlier years of the PD resistance breeding program under greenhouse conditions and bacterial populations were quantified by ELISA. Cane maturation index (CMI) and leaf scorch/leaf loss symptoms were also recorded.

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