Injury means any blemish or defect, that more than slightly affects the appearance, or the edible or shipping quality. The following shall be considered as injury:
Bosc, Clairgeau, Easter Beurre, Flemish Beauty, Kieffer, P. Barry, Pound, Seckel, Sheldon, Winter Nelis, and other similar varieties.
7 C.F.R. §51.1319