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Experimental transmission of citrus blight

Experimental transmission of citrus blight

Plant Disease 68(11): 979-980

Eight mature, blight-affected Pineapple sweet orange (Citrus sinensis) trees on rough lemon (C. jambhiri) rootstock were transplanted to an area of low blight incidence. Healthy trees of bearing age and of the same cultivar were transplanted next to each blight-affected donor tree and several roots each of the healthy, receptor trees and the blighted donors were splice-grafted together. An equal number of control trees was transplanted to an adjacent row. After 3 yr, receptor trees had significantly higher concentrations of Zn in trunk phloem than the controls. After 4 yr, 7 of 8 receptor trees had typical visual symptoms of blight, significantly higher concentrations of Zn in trunk wood, lower water uptake, and amorphous plugs in the vessels of the trunk. Only one of 8 control trees developed these typical blight symptoms. This is the 1st report of experimental transmission of citrus blight.

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Accession: 001364382

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