The pear sucker Cacopsylla pyri L. is a key pest of pear in Europe, including Bulgaria. Chemical control is usually not effective enough as the pests have become resistant to most of the registered insecticides. The need of alternative solutions drew researchers` attention on the regulating abilities of its natural enemies - predators and parasitoids. The aim of the present study was to search for parasitoid species and establish their potential as biocontrol agents. In 2005 - 2008 in the Central region of South Bulgaria two parasitoid on the nymphs P. psylla were found - Trechnites psyllae (Ruschka, 1923), Prionomitus mitratus (Dalman, 1820), and a hyperparasitoid Pachyneuron muscarum (Linaneus, 1758) (Pteromalidae, Pteromalinae). At 24 Cthe development time for T. psyllae from egg to adult was 21.96 and 19.6 days for females and males respectively and at 28C - 14.81 and 13.35 respectively. The development time for P. mitratus at 24C for female and males was 23.45 and 21.93 respectively. For both parasitoids females develop slower that males. Data is given about the morphology of parasitoids.
Parasitoids of the pear sucker Cacopsylla Pyri L. (Psyllidae) in Bulgaria - morphology and biology