Baroffio, C. 1997 [Some aspects of the biology of Encarsia perniciosi (Tower) in its host, Quadraspidiotus perniciosus (Comstock), and application of the results in a biological control program in central Switzerland (Canton Zug).]. Mitteilungen der Schweizerischen Entomologischen Gesellschaft 70: 323-333.

Notes: Original title: Quelques aspects de la biologie de Encarsia perniciosi (Tower) dans son hote, Quadraspidiotus perniciosus (Comstock). Applications de ces donnees dans un programme de lutte biologique en Suisse centrale (Canton de Zoug). The biology of Encarsia perniciosi in its host, Quadraspidiotus perniciosus (SJS), was studied. The aim of the study was to develop a technique for a controlled release of the parasitoid in the field in pumpkins (Cucurbita maxima). As a support, pumpkins infested with SJS were used. It was best to have 3 days of contact between the parasitoids and SJS when they were between 6 and 9 days old. The pumpkins with parasitized SJS were transferred to the field 1 month later. After 3 years, the parasitoids were well established. The parasitism rate calculated on branches in the third spring was 75%. A strategy to avoid reinfestation with SJS which escaped parasitism is discussed.