holm oak trunk marked as root rot diseased also called la seca

holm oak trunk marked desease seca root rot diseased broken dry death tree damaged mediterranean forest phytophthora cinnamomi phytopathological environment nature botany outdoor forestry iberian peninsula plague encinares encina agroforestry woodland quercus rotundifolia decay southern spain microscopic fungus attacks harmful invasive alien species pasture areas loss productivity conservation anthropic called seca selective focus