Resumo

MARMOLEJO, José G.; MENDEZ CORTES, Heriberto  e  CANTU A., César. Impact of Phellinus pini (Brot.) Bondartsev & Singer in Pinus greggii Engelm. forests of Nuevo León state. Rev. mex. de cienc. forestales [online]. 2011, vol.2, n.6, pp.85-94. ISSN 2007-1132.

Phellinus pini is widely distributed in the Northern Hemisphere, causes the red ring rot and is the most important agent that affects softwood trees. In recent years the death of many Pinus greggi examples has been detected in Santiago Municipalitiy, Nuevo Leon State, which has been linked to it, with the resulting tree mass deterioration of the Monterrey Heights National Park. Thus, and due to what forests are worth in the State, the following objectives were proposed for this study: to determine the impact of Phellinus pini, its association with some forestry variables and the pathological rotation age. Circular sampling lots were placed in various locations; rottenness was assessed through samples taken by a Pressler boarer, and its eventual laboratory cultivation in Petri boxes. Forestry variables were taken from all the sampled trees to determine the factors that favor the incidence of this pathogen and, finally, the pathological rotation age. Age was the highest correlation variable, which was confirmed with the eldest examples, over which the most severe damages were observed. Incidence and severity were 11.66 and 12.3%, respectively; the pathological rotation age was 50 years.

Palavras-chave : Disease incidence; Phellinus pini; Pinus greggii; white rot; pathological rotation age; forestry variables.