Publications for:

pest = Erysiphe howeana
crop = Primrose (Oenothera)

found 2 publications:

2015

First record of Erysiphe howeana from China
Mycotaxon (2015) 130 (3), 695-700
publishers website - pestinfo wiki

2007

Introductions of non-native plant pathogens into Great Britain, 1970-2004
Plant Pathology (2007) 56 (5), 891-910
publishers website - pestinfo wiki