Ribosomal spacer length variability in the large raspberry aphid, Amphorophora idaei (Aphidinae: Macrosiphini)

adn aphididae bayas biotechnologie biotechnology biotecnologia biotipos biotype biotypes dna framboise frambuesa genetica genetics hemiptera insecte nuisible molecular genetics pest insects pest resistance pests of plants plagas de plantas raspberries ravageur des plantes reino unido resistencia a las plagas ribosomas ribosome ribosomes soft fruits uk united kingdom