Cherry fruit fly (Rhagoletis cerasi L.) is the most important and most dangerous pests treasure. Attack and cherry and marasch. Rhagoletis cerasi L. has been expanded throughout the area of breeding of these species in the Republic of Croatia. Due to the fact that cherry fruit fly is only a technological pest attacking only the fruits by causing their "crunchiness", the result of fever or attack results in poor fruit quality, susceptibility to rotting, lower amount of cherry juice. The Jazbina faculty's experiment was conducted to monitor the dynamics of flywheel flight by visual bait or yellow sticky boards. In addition to tracking the number of catches flies on the boards, the data of the Meteorological and Hydrological Service for Maksimir station were used in the collection of the effective soil temperatures required for the development of pests. Based on the results of monitoring flight dynamics cherry fruit flies in 2017 using yellow sticky boards, did not contain cherry fruit fly (Rhagoletis cerasi L.) on experimental college Jazbina, and to all other investigated areas (Garden of the Institute of Pomology, Lašćina). The reason for the absence or failure of the cherry fruit fly can be caused by various factors, of which the most important climatic conditions depend on the development of pupae in the soil to the adult form. Since there was no registered cherry fruit fly on the locality Jazbina, as in Maksimir and Lašćina, attempts were made to look for larvae cherry fruit fly in the fruits of cherries from other localities; during the experiments on June 12, 2017, four larvae were harvested in cherry fruits collected from the area of Čazma, in Bjelovar-Bilogora County.