Galling and reversion disease incidence in a range of blackcurrant genotypes, differing in resistance to the blackcurrant gall mite (Cecidophyopsis ribis) and blackcurrant reversion disease

acarina agallas black currants cassis cecidophyopsis cecidophyopsis ribis control methods disease resistance enfermedades de las plantas ensayo escocia finland finlande finlandia galle genotipos genotypes grosella negra maladie des plantes methode methods pathogens plant diseases plant galls plant viruses resistencia a la enfermedad ribes nigrum scotland testage testing virus de las plantas