According to the data obtained from the research we find that the natural growth regulator Reglalg and Reglalg in combination with trace elements have had a beneficial effect in regulating the activity of enzymes peroxidase and polyphenol oxidase which play an important role in vital processes of resistance and increased plant productivity.The redox processes in the leaves of the tardive Noiabriscaia and Socrovisce pear varieties depended on the metabolic processes in the development of plants in ontogenesis, the stages of plant development, the action of their living conditions, the amount of oxidative substances that formed in plant cells under the action of high temperatures, give the particularities of varieties as well as the action of SBA Reglalg and microelements used to treat trees.Thus, with the modification of peroxidase and polyphenol oxidase activity during phenophases, we find their participation in metabolic processes that correlate with the function of resistance and adaptation of plants to unfavorable environmental conditions and consequently crop formation and fruit quality.