Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

The San José scale in German-speaking Switzerland: where do we stand today?

Abstract

Quadraspidiotus perniciosus, an important quarantine pest of temperate fruits, is reported from northern Switzerland in 1990-94, where it was monitored with pheromone traps. The distribution of the diaspidid in successive years is mapped. Quarantine control measures, chemical control with mineral oils and diofenolan, and biological control measures using the aphelinid parasitoid Encarsia perniciosi in Switzerland are described.