EN
Summary on biological control studies conducted at Ukrainian Institute of Plant Protection is presented. New biological control agents were evaluated, including entomopathogenic fungi, starting from strains selection till their practical application. Measures to increase Trichograma spp. usage efficacy were developed. Impact of chitin-synthesis-inhibitors and other biopesticides on Trichograma spp. was investigated to develop technology of their consecutive application in vegetable crops and orchards. It was observed that variety characteristics play significant role in Trichograma spp. seasonal colonization ability.