Oaks Decline in the North and West of Transylvania

The basic concept on which are ruled the forests in Romania is the one of realizing a stable forestry. Animportant way to achieve this objective is to stop the quercines wither. This can be done by carefully studying of thebiotic and non-biotic factors. The present work proposes a clear-up concerning the involvement of the biologicalfactors, i.e. the micromycetes, in the oak decline. This can be done by carefully studying of the biotic and non-bioticfactors. Despite the researches that have been developed, of numerous studies and analysis done by different experts inforestry, biology, chemistry, geology, environment protection etc., the problem is still far to be completely resolved,because of the complex characteristics of the causal agents. The forms of Chalara type are frequent found in flowers,acorns and wood from oak and sessile oak, they are a reality that we believe it must be considered, even if the species ofwhich they belong are not always rigorous identified. It remains to establish in the future their pathogenic power, alsomuch controvert. We also consider that it is necessary to give an increased attention to the competitive saprophytefungi, to eventually use them in biological pest control.