The gall midges (Cecidomyidae, Diptera) of forest tree species and their seeds in Bohemia [Czechoslovakia]

agallas agentes nocivos animal animal nuisible animales animales nocivos animals arbre arbre forestier arthropode arthropods cecidomyiidae cecidozoa checoslovaquia czechoslovakia diptera economic plants especies europa europe facteur nuisible forest trees galle injurious factors insecte insecte gallicole insecte nuisible insectos insectos causantes de agallas insects invertebrados invertebrates noxious animals organisme nuisible pest insects pests plagas plant galls plantas plante plants species symptome symptoms taxa taxon taxonomia taxonomie taxonomy trees