ISHS Acta Horticulturae 472: XVII International Symposium Virus and Virus-Like Diseases of Temperate Fruit Crops
EXPRESSION OF PEACH MOSAIC SYMPTOMS IN NECTARINE AND PEACH CULTIVARS |
| Authors: | H.J. Larsen, K.S. Yu, A.H. Hatch |
| Keywords: | bloom delay, flower color breaking, shoot stunting, foliar mosaic, fruit deformation |
| Abstract:
Nectarine and peach cultivars inoculated with peach mosaic were observed for symptom expression in a field study in northern Mexico and a subsequent greenhouse study in western Colorado. Seven nectarine cultivars (Fantasia, Firebrite, Flavortop, Independence, Mericrest, Red Chief, and Red Gold) and three peach cultivars (Jayhaven, Jim Wilson, and Topaz) were previously untested for response to peach mosaic infection; all except Red Chief are yellow-fleshed and freestone cultivars. All exhibited typical foliar mosaic, shortened internodal shoot growth, delayed bud break, and either flower color breaking or petal deformation symptoms. Flavortop, Independence, Mericrest, and Red Gold nectarine cultivars and the Jim Wilson peach cultivar produced deformed fruit; the other cultivars produced no fruit during the studies. Symptom expression appeared to be more closely associated with the yellow flesh and freestone fruit characteristics than with the lack of fruit pubescence that characterizes nectarines. | |
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