Chamomile downy mildew
Fungus
Identification key : 
Downy mildew and late blight (oomycetes) (Damage and symptoms on the host)
Scientific name : Peronospora radii
Other names : Peronospora radii
Oomycete of several Asteraceae whose best-documented host is chamomile (Matricaria chamomilla). It mainly affects the ray florets: flower heads become distorted, sometimes branched, and lose their disc florets; it may also appear on leaves as a greyish-violet growth. It was reported as a threat to chamomile growing in northern Serbia from 2004.
Crops affected : Chamomile
Source : Peronospora radii - Wikipedia — Peronospora radii - Wikipedia
This page lists the bio-preparations in the collection that other references associate with this opportunist: Chamomile downy mildew.
Warning: the associations between recipes and opportunists come from other references (traditional practices, publications, user feedback). They are neither a recommendation nor a claim of effectiveness. There is no certainty regarding the preparation, application and use of these bio-preparations. See the regulations
No published recipe is associated with this opportunist yet.