Pear psylla, Cacopsylla chinensis (Yang and Li) (Hemiptera: Psyllidae) has been one of more important pests of commercial pears in Palearctic and Nearctic Region since it can suck the sap from young leaves, shoots, and buds (Luo et al. 2012). The most notable morphological characteristic of the adults is seasonal dimorphism (Horton et al. 1994), that is, they are small, light-colored (summer form) during growing season, then become large and dark in later autumn and winter (winter form) (Butt and Stuart 1986). High-density populations of C. chinensis can cause premature leaf drop, diminish plant growth, and reduce fruit size by sucking the sap of leaves, shoots, and fruits. In addition, they are also considered vectors of pear pathogens such as Erwinia amylovora Burrill (Hildebrand et al. 2000) andCandidatus Phytoplasma pyri (Carraro et al. 1998). Their honeydew promotes sooty mould on leaves and fruits (Shaltiel-Harpaz et al. 2014).