V. Arnaudov* Institute of Fruit Growing, 12 Ostromila, 4004 Plovdiv, Bulgaria (Manuscript received 30 June 2016; accepted for publication 7 September 2016) Abstract. The effectiveness of spirodiclofen (Envidor® 240 SC) in the control of pear psylla (Cacopsylla pyri L.) on pear trees w

V. Arnaudov* Institute of Fruit Growing, 12 Ostromila, 4004 Plovdiv, Bulgaria (Manuscript received 30 June 2016; accepted for publication 7 September 2016) Abstract. Pear psylla (Cacopsylla pyri L.) (Hemiptera: Psyllidae) is one of the key insect pests in pear orchards of Bulgaria. Fi

S. Georgieva*, M. Stancheva Department of Chemistry, Medical University, Marin Drinov 55, 9002 Varna, Bulgaria (Manuscript received 25 April 2016; accepted for publication 30 May 2016) Abstract. Polychlorinated biphenyls (PCBs) are characterized by high lipophilicity and persistence i

The Tabanids (Diptera: Tabanidae) from the Belassitsa Mountain, Bulgaria D. Ganeva