Study Concerning the Attack of Tortrix viridana L. and Microsphaera abbreviata L. upon Quercinae Species within Climatic Conditions of the County of Hunedoara, Romania

Ioan Oroian, Constantin Șulea, Ilie Covrig, Petru Burduhos, Dacian Pop

Abstract


The research was carried out during a three years experimental period, 2012 – 2014, within an experimental plot
populated by oak trees of different ages, located in the Forestry Direction Reghin, County of Hunedoara. The evolution
of the climatic factors, and attack degrees of Forestry Direction Reghin, County of Hunedoara and powdery mildew was
monitored. In the end of the experimental period, one may find that while the mean values of the climatic factors exhibit
discontinuous evolutions, the attack degrees of the progressively increased from the year 2012 to 2014, from 39.67% to
44.43% for the European oak leaf roller, while for the powdery mildew it increased from 20.23% to 26.93%.


Keywords


correlation, diameter, height, slenderness.

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