Status of the research on the origin of the damages affecting Douglas-fir - present recommendations for the practice. Proceedings of the Douglas-fir colloquium, held on 15 th-16th April 1997 in Adenau (Eifel)

acid deposition aetiology agentes nocivos changement climatique climatic change contenido mineral crecimiento croissance cultivation cultivo damage deficiencia de minerales efecto invernadero effet de serre enfermedades de las plantas enfermedades fungosas etiologia etiologie experimentation facteur nuisible frost damage fungal diseases genetica genetics greenhouse effect growth injurious factors insecte nuisible maladie des plantes maladie fongique manganese manganeso mineral content mineral deficiencies pest insects plant diseases pratique culturale procedencia provenance pseudotsuga menziesii symptome symptoms toxicidad toxicity