Kreiter, P., Marro, J.P., Dijoux, L., & Tourniaire, R. 1998 [The Japanese citrus fruit scale, Unaspis yanonensis, is still causing problems on the French Riviera.] La cochenille japonaise des agrumes, Unaspis yanonensis: sur la Côte d'Azur, le problème n'est toujours pas resolu.. Phytoma No. 508, 32-33.

Notes: Unaspis yanonensis is still the cause of widespread damage to citrus fruit on the French Riviera. During recent years, beneficial insects have been released, with apparent effectiveness. In 1997, samples were collected in order to draw up a list of parasitoids. The list contained many different species, but the species which had been released in greatest numbers (Aphytis yanonensis) could not be found. It would therefore seem that the species cannot survive from one year to the next and that in order for effectiveness to be ensured, renewed release of this particular parasitoid is required.