The impact of the intensity of selective sanitary cutting in oak forests on the defeat of the pedunculated oak (Quercus Robur L.) trees by powdery mildew

The article assesses the impact of the intensity of selective sanitary cutting in oak forests on the defeat of oak trees by powdery mildew. The research methodology included visual estimation and detailed inspection of oak plantations. On their basis, the species composition of pathogens was identified, the degree of crown desiccation from a complex of factors and leaf infestation with powdery mildew and necrotic spots was assessed. The dispersive analysis was applied for data processing. The analysis of the long-term survey of the plots passed by selective sanitary cutting shows that the degree of damage to oak trees by powdery mildew on permanent test areas practically does not depend directly from selective sanitary cutting, in general, and from their intensity, in particular. The dynamics of the damage degree of the oak trees by powdery mildew changed almost synchronously in all test areas and in the control area. The results can be used in the practice of the Voronezh region forestry enterprises when carrying out forest pathology surveys.