Associations
provided by BioImages, the virtual fieldguide, UK
In Great Britain and/or Ireland:
Foodplant / parasite
Erysiphe howeana parasitises Oenothera biennis
Foodplant / parasite
Erysiphe howeana parasitises Oenothera glazioviana
Foodplant / parasite
Erysiphe howeana parasitises Oenothera indecora
Foodplant / parasite
Erysiphe howeana parasitises Oenothera odorata
Foodplant / parasite
Erysiphe howeana parasitises Oenothera ravenii
