(−)-β-Pinene (Nopinene) is a natural organic compound in various plants. It is lethal to S. littoralis third instar larvae (LD50 = 65 μg/larva), inhibits infectious bronchitis virus (IBV) replication (IC50 = 1.32 mM) and exhibits a cytotoxic concentration (CC50) value of greater than 10 mM in Vero cells.