Jankuloska1*, I. Karov2, G. Pavlovska1 1Faculty of Technology and Technical Sciences – Veles, “St. Kliment Ohridski” University – Bitola, Dimitar Vlahov 57, 1400 Veles, Republic of Macedonia 2 Faculty of Agriculture, University Goce Delchev, 2400 Shtip, Republic of Macedon

D. Salkova*, M. Panayotova-Pencheva Department of Experimental Parasitology, Institute of Experimental Morphology, Pathology and Anthropology with Museum, Bulgarian Academy of Sciences, Acad. G. Bonchev 25, 1113 Sofia, Bulgaria (Manuscript received 18 January 2016; accepted for public

V. Yankova, S. Masheva, B. Boev, K. Toskov Abstract. The endoparasite Encarsia formosa Gah. is one of the well-known and frequently used bioagents for control of greenhouse whitefly (Trialeurodes vaporariorum Westw.). The effect of many applied pesticides is negative towards this usef