Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: First record of Phytophthora cinnamomi on cork and holm oaks in France and evidence of pathogenicity. | Ann. Sci. For. 55 1998 869-883 Inra Elsevier Paris 869 Original article First record of Phytophthora cinnamomi on cork and holm oaks in France and evidence of pathogenicity Cécile Robina Marie-Laure Desprez-Loustaua Gilles Caprona Claude Delatourb Laboratoire de pathologic forestiere station de pathologic végétale Inra Bordeaux BP 81 33883 Villenave d Ornon France b Laboratoire de pathologic forestiere Inra Nancy 54280 Champenoux France Received 25 August 1997 accepted 20 February 1998 Abstract - In 1995 and 1996 a survey for the presence of Phytophthora cinnamomi in cork and holm oak sites in southeastern France was carried out. Twenty-four sites were chosen. Tree decline severity and other characteristics were assessed. Subplots of four trees were more fully investigated relative soil water content was assessed and Phytophthora isolation was attempted from soil samples. When cortical lesions were observed isolations were carried out from infected tissues. In six cork oak and one holm oak sites p. cinnamomi was isolated from soil or trunks. All the different isolates obtained in 1995 were aggressive on cork and holm oaks. However these species were less susceptible than Castanea sativa and more susceptible than Q. rubra. These results confirm the pathogenicity of p. cinnamomi towards Mediterranean oaks and its possible involvement in the decline process of these species. Inra Elsevier Paris. Quercus suber Quercus ilex I Phytophthora cinnamomi I soil detection trunk cankers cork Resume - Premiere mention de Phytophthora cinnamomi sur chêne liège et chêne vert en France et mise en evidence de son pouvoir pathogène. Phytophthora cinnamomi a été recherche dans des sites de chênes liège et verts en 1995 et 1996. Vingt quatre sites ont été choisis dans lesquels 1 inten-sité du dépérissement et les principales caractéristiques stationnelles ont été décrites. Au pied de quatre arbres par site des échantillons de sol ont été prélevés pour mesurer la teneur relative en eau
