The life history of Psylla mali Schmidberger (Hom., Psyllidae); and its relationship to the development of the apple blossom [apple sucker]

agentes nocivos animal animal nuisible animales animales nocivos animals apples arbre arthropode arthropods beverage crops biological rhythms chemicophysical properties ciclo vital crops cultivos developmental stages dimension dimensions dynamique des populations economic plants escandinavia etapas de desarrollo etapas de desarrollo de la planta europa europe facteur nuisible floraison flowering fruit crops frutales frutas de clima templado grosseur hemiptera homoptera injurious factors insecte insecte nuisible insecte suceur insectos insectos chupadores insects invertebrados invertebrates life cycle manzana noruega norway noxious animals organisme nuisible ornamental plants ornamental trees pest insects pests plagas plant developmental stages plantas plantas ornamentales plantas para bebidas plante plante de culture plante ornementale plants pomme population population density population dynamics psylla rythme biologique scandinavia scandinavie sex sex ratio sexe sexo size sucking insects temperate fruits temps tiempo time timing trees