Blueberry Scorch Virus has been described as a heterogeneous collection of strains, including the "Northwest" strains associated with Blueberry Scorch on the west coast of North America and others associated with Sheep Pen Hill Disease in New Jersey on the east coast (Cavileer et al., 1994). Sheep Pen Hill disease is caused by a carlavirus which should be considered to be the "New Jersey" strain) of Blueberry Scorch Virus (BlScV-NJ) (Cavileer et al., 1994; Martin et al., 1992; Martin and Bristow, 1995). The "New Jersey" strain (a.k.a. Sheep Pen Hill) of BlScV is considered more severe than the "Northwest strain" and it infects all highbush blueberry varieties except for "Jersey" (BC MAFF, 2002).