Neuffer, G. 1968 Die Wirksamfeit der Aphelinide Prospaltella perniciosi Tower im südwestdeutschen Befallsgebiet der San-José-Schildlaus Quadraspidiotus perniciosus Comstock.. Anzeiger für Schädlingskunde vereinigt mit Schädlingsbekämpfung 41: 97-101.

Notes: Title in English: [The effectiveness of the Aphelinid Prospaltella perniciosi Tower in southwest Germany on the insect pest San José scale Quadraspidiotus perniciosus Comstock.] P. perniciosi has been mass bred and released on apple orchards in the U.S., Canada, USSR and China over a period of 14 years. The participation rate of P. perniciosi has been shown to be 90%.