THE INFLUENCE OF THE TREATMENT WITH FUNGICIDES ON THE PHYSIOLOGICAL PROCESSES IN PRUNUS PERSICA (L.) BATSCH ATTACKED BY MONILINIA FRUCTIGENA (ADERH. & RUHL.) HONEY

Abstract

Researches regarding the influence of the treatment with fungicides on the physiological processes were carried out on Prunus persica (L.) Batsch, Redhaven variety, cultivated in the climatic conditions in Oltenia region. The physiological researches were performed on July 20th 2022, both for peach trees treated with Dithane M-45 (0,2%) fungicide and also for the peach trees attacked by Monilinia fructigena (Aderh. & Ruhl.) Honey, in which treatments have not been performed. In the leaves of the plants attacked by the pathogen it was observed that the physiological processes’ intensity (photosynthesis and transpiration intensity) is lower as a result of the effects produced by the pathogen manifested by drying young shoots with the convexity of their top, the presence of brown spots on the fruits and the appearance of the fructifications of the pathogen. In the attacked leaves there were recorded lower values of chlorophyll content, in comparison with the leaves of plants treated with fungicide, thus existing a positive correlation between this content and the photosynthesis intensity.