THE EFFECT OF FUNGICIDES ON THE PHYSIOLOGICAL PROCESSES IN PRUNUS ARMENIACA L. ATTACKED BY STIGMINA CARPOPHILA (LÉV.) M.B. ELLIS

Abstract

These researches aim of presenting the effect of fungicides on the physiological processes in Prunus armeniaca L. (Litoral variety) attacked by Stigmina carpophila (Lév.) M.B.Ellis., in Oltenia region. Shot hole disease appears in intensified cool and wet conditions of spring, but can occur and cause damage at any time during prolonged wet weather. The physiological researches were carried out in the leaves of plants after treatments with fungicide and the leaves of plants attacked by the pathogen in which treatments with fungicide have not been performed. In the leaves of the Prunus armeniaca L. plants attacked by the pathogen, in comparison with the leaves of plants after treatments with fungicide, it was found that the physiological processes’ intensity during the day has low values as a result of the harmful action of the pathogen which is manifested by the small reddish or purplish, with yellow halo bordered spots, the centre of which drops out as the spot ages. In the leaves of the plants attacked by the pathogen lower values of water content were recorded, which produces water imbalances, but also lower values of chlorophyll content, which correlates with the intensity of photosynthesis.