Publications for:

pest = Bremia lactucae
crop = Helichrysum (crop)

found 2 publications:

2007

Downy mildew caused by Bremia lactucae on strawflower (Helichrysum bracteatum) in California
Plant Disease (2007) 91 (3), p. 326
publishers website - pestinfo wiki

2003

First report of Bremia lactucae causing downy mildew on Helichrysum bracteatum in Italy
Plant Disease (2003) 87 (3), p. 315
publishers website - pestinfo wiki