* Lanteri AA, Marvaldi AE, Suarez SM (2002) Gorgojos de la Argentina y sus plantas huespedes, Tomo I: Apionidae y Curculionidae. Publicacion Especial de la Sociedad Entomologica Agrentina.
------- reported as host but evidence is lacking that they can support completion of ful life cycle.
* Mertelik J, Mokra V, Gotzova B, Gabrielova S (2002) Occurrence and identification of impatiens necrotic spot tospovirus in Czech Republic. Acta Horticulturae 568, 79-83.
------- As Asparagus sprengeri (it should be noted that there has been some confusion about the correct name of 'Sprenger asparagus', which is now considered to be A. aethiopicus and not A. sprengeri a synonym of A. densiflorus).
* INTERNET
Regione Piemonte. Servizio fitosanitario. Lotte obbligatorie - Coleottero scarabeide del Giappone (Popillia japonica Newman). Popillia danni e difesa. https://www.regione.piemonte.it/web/sites/default/files/media/documenti/2019-06/popillia_danni_difesa.pdf
* Mound LA, Palmer JM (1981) Identification, distribution and host-plants of the pest species of Scirtothrips (Thysanoptera: Thripidae). Bulletin of Entomological Research 71, 467-479.