Rozova L. Biological rationalization of the system of sweet cherry protection from cherry fruit fly (Rhagoletis cerasi L.) under the condition of the Ukraine's south.

Object - cherry fly population, parasites and predators, methods of cherry protection against cherry fly. Aim - substantiation of cherry protection system against cherry fly in south of Ukraine. Methods - monitoring, laboratory experiments, field experiments, statistical method. Scientific novelty - character and specifics of ontogenesis, peculiarities of development and harmfulness of cherry fly on varieties with different terms of ripeness in south of Ukraine. Factors, which determine stable high population and ability of forming of multy-year diapause were determined. Methods of monitoring for imago of pest, methods of use for feromone traps were optimized and quantitative criteria of trapped imago for protection of cherry were developed. Methods foe determining of viability of cherry fly females, levels of potential hazard of pest on the base of assessment functional activity of gonads by methods of their preparation. Methods of short-term forecast of development of cherry fly, term of use for insecticides in dependence of character of pest dynamics were improved. Action and efficiency of native cultures of different microorganisms on diapaused puparies were investigated. The principal possibility of use of isolates of microorganisms from californian scald (Bacillus thuringiensis subsp, tenebrionis) was established. Efficiency of several agrotechnic measures for control of population and harmfulness of fly in private and collective orchards was substantiated. Sphere of use - agriculture, plant protection, horticulture.