The research was made in the orchard company SRL "Codru-ST” in village Rassvet, district Străşăni. The orchard was planted in autumn of 2004, with two years old tree, such as "knip-baum". The planting distance is 3.25 x1.20 m. In 2011, it was studied the influence of different thinning methods of reproductive organs Idared variety grafted on M9 rootstock. According with supplied growth regulators intended for chemical thinning of reproductive organs was developed the following scheme: no thinning (c); manual thinning; Pomonit 050SL - 0.4 l/ha; Dirager - 0.3 l/ha; Metamitron - 3.5 l/ha; Dira Max LG - 2.5 l/ha and Dira Max LG 3.5 l/ha. It was found out that those different normalization methods that were developed have positively influenced the number and average weight of fruits, fruits quantity and quality. The most effective thinning preparations of reproductive organs of given variety are considered Dirager in dose 0.3 l/ha and Dira Max LG in dose 2.5 l/ha.