Publications for:

pest = Podosphaera xanthii
crop = Marigold (Calendula officinalis)

found 2 publications:

2008

First report of powdery mildew caused by Podosphaera xanthii on Calendula officinalis in Italy
Plant Disease (2008) 92 (1), p. 174
publishers website - pestinfo wiki

2004

Infektionszyklus und biologische Bekämpfung von Podosphaera xanthii, dem Echten Mehltau der Ringelblume (Calendula officinalis)
[Infection cycle and biological control of Podosphaera xanthii, the powdery mildew of marigold (Calendula officinalis)]
Gesunde Pflanzen (2004) 56 (7-8), 201-207
publishers website - pestinfo wiki