Bojko G. The specialization of oak leafroller moth (Tortrix viridana L.: Lepidoptera, Tortricidae) to host plant and its expression in individual consortiums and phenological groups of oak consortiums.

Research subjects: oak leafroller moth, sessile and pubescent oaks. Research objectives: To investigate adaptations of the herbivore to feeding and development on its host plants. To estimate efficiency of defense features of sessile and pubescent oaks, especially the role of leaves' secondary metabolites. Methods: Phenological studies, thin-layer chromatography in polyamide. Theoretical and practical results: adaptation of oak leafroller moth caterpillars to plant defense factors were studied in individual consortions of oak trees. Novelty of introduced: the method of thin-layer chromatography in polyamide was applied for the first time to the study of composition of secondary metabolites from oak leaves. Thirty nine individual compounds were found in leaves of sessile and pubescent oaks. They are able to play a role of potential allelochemics for the herbivore. There were investigated for the first the changes in the complex of secondary metabolites in natural food during its moving throughout caterp illar's midgut of monophage - oak leafroller moth and polyphage - gypsy moth. Implementation degree: The results of investigation are using as a part of special course "Population ecology", which is addressed to the students specializing in the department of ecology of Tauria National V.I. Vernadsky University. Effectiveness: The results promote the development the notion on the defense factors in oak leaves and on the specialization of oak leafroller moth to them. The results may serve as a base for creation of oak plantings, naturally resistant to herbivore outbreaks. Sphere, sector of implementation: botany, zoology, ecology, forestry, biological plant defense.