This article presents the results of research on the dynamics of acorn fall of pedunculate oak in the “Codrii” Reserve. The monitoring of acorn fall in pedunculate oak was performed by two methods: the isolated acorn variant and the control variant. As a result, in the case of the control variant during the research years it was observed that only 1.1% - 14.4% of the initial number of flowers became healthy mature acorns, 13.3% -32.2% were unfertilized, 43.2% -65.2% of acorns were aborted by the plant in various stages of acorn development, 5.3% -12.8% - attacked by Curculio glandium, 4.7% -10.8% - by Cynips sp., 0.3% -2% - of Carpocapsa sp. In the isolated flowers/acorns variant, the healthy mature acorns constituted 11% -36.5% of the initial number of flowers, 10.4% -34.5% - unfertilized flowers, 43.7% -59.7% - aborted acorns by the plant.