Horváth, B.Benedek, P.2021-06-282021-06-282007-03-19International Journal of Horticultural Science, Vol. 13 No. 1 (2007) , 65-73.1585-0404https://hdl.handle.net/2437/314434Studies available up to now usually report changes in populations of Camel - cola ohridella and its parasitoids in a period of 3 years or shorter. Due to the limited duration of investigations, no tendencies of changes could be disclosed and, according to the general idea, the infestation level of the horse-chestnut leafminer and the rates of parasitism do not change significantly. Based on our examinations carried out throughout 7 consecutive years we suggest that the infestation level of C. ohridella is generally decreasing and the rate of parasitism is increasing. A possible adaptation of the parasitoids to this new host is showed on the changes of parasitism. In contradiction with earlier studies, authors assume that a partially stable permanent parasitoid community is being developed around the horse-chestnut leafminer. Proportions of adult moths and parasitoids hatched in the same year of sampling or the next year were determined.application/pdfadaptationCameraria ohridellahorse-chestnut leafminerparasitismparasitoid communityfolyóiratcikkOpen AccessInternational Journal of Horticultural Sciencehttps://doi.org/10.31421/IJHS/13/1/697International Journal of Horticultural Science113Int. j. hortic. sci.2676-931X