Phenological observations of pear species in the Mari El Republic

The results of phenological observations of plants vegetative and generative organs of Pyrus species (P. communis, P. ussuriensis, P. caucasica) in the VSUT Botanical garden-institute for the period 2014-2017 are presented. Studied species pass a full cycle of seasonal development. The sequence of phenophase is determined. The plants of P. caucasica differed in the late passage of most phenophases, P. ussuriensis - in the early end of growing season.