Resistance potential of natural spruce stands and its variations [pests, abiotic factors]

agentes nocivos agronomic characters animal animal nuisible animales animales nocivos animals arbre arbre brise-vent arbre forestier arbre pour bois de construction biological control breeding breeding aims conifere conifers crops cultivos disease resistance diseases economic plants enfermedades fungosas environmental effects facteur nuisible forest trees gimnospermas gymnosperme gymnosperms injurious factors insecte nuisible lutte biologique mycose mycoses noxious animals objetivo de mejoramiento organisme nuisible pest control methods pest insects pest resistance pests picea picea abies pinaceae plagas plantas plantas protectoras plante plante de culture plante de protection plante pour construction plants protective plants resistance to injurious factors resistencia a la enfermedad resistencia a las plagas resistencia al viento structural crops timber trees trees wind damage wind resistance windbreak trees