THE REACTION OF FRAGARIA VIRGINIANA TO THE VIRUS OF YELLOW-EDGE

Abstract

When runner-grafted to domestic plants of the strawberry varieties Premier and Glen Mary (symptomless carriers of the virus of yellow-edge) clones of the common wild strawberry, Fragaria virginiana Duchesne, were found to vary widely in their resistance and susceptibility to the disease. Certain clones of noticeably more delicate growth type, proved to be very highly susceptible to deterioration and exhibited complete symptom-expressing propensities. Other clones, characterized by a particularly robust type of vegetative growth, although readily susceptible, showed capacity for at least partial recovery, tending to react more like the English indicator variety, Royal Sovereign. Still other clones, also of the robust type, showed resistance that was virtually complete; thus they were eliminated from plants of the "carrier" class.