Campbell Nucellar Valencia Orange Budwood

Citrus sinensis L.

 The fruit is indistinguishable from Valencia, but the tree exhibits certain consistent, discernible differences in vigor and behavior in comparison with Valencia.  In trials of the two parent clones and of nucellar clonal budlines of comparable age, the trees of Campbell have consistently been more vigorous, thornier, larger, broader-topped, and slower to come into bearing than Valencia.  The fruit has also been slightly lower in juice content than Valencia in the coastal region and has exhibited a greater tendency to regreen in the interior districts (Lombard, 1663).  Moreover, in a trial at Santa Paula, Campbell is reported to have shown a higher, though small, percentage of fruits that were creased or of a chimeric nature.  These differences, however, might possibly relate to infection by the stubborn virus. During recent decades Campbell has been planted considerably in California.  More recently, the Campbell nucellar budline has achieved popularity.  This seedling is indistinguishable from Campbell, but is more vigorous, thornier, and considered to be of nucellar origin.

Rootstocks of accession:  Carrizo citrange, C-35 citrange.

Season of ripeness at Riverside, California:  March to July.

Prepared by the Givaudan Citrus Variety Collection at The University of California Riverside.