Plasmopara densa

Description

A downy mildew on Rhinanthus minor and Odontites vernus, forming a dense white down on the leaf undersides.

Identification difficulty

host

Recording advice

Photograph both sides of the leaf and the downy mildew on the host plant; ensure you have noted the host species in your comments

Habitat

on Yellow Rattle and Red Bartsia

sue
Leicester, Discovery Rd, Cardinal's Meadow
18 April 2026
normal Rhinanthus minor shoot on left
pale affected shoot on right
sue
Leicester, Discovery Rd, Cardinal's Meadow
18 April 2026
mildew on leaf undersides
sue
Whitwick, Coalville Meadows SSSI
23 April 2026
Yellow (Hay) Rattle - shoot paler than usual
sue
Whitwick, Coalville Meadows SSSI
23 April 2026
mildew on leaf underside
sue
Leicester, Discovery Rd, Cardinal's Meadow
18 April 2026
on Rhinanthus minor
sue
Leicester, Discovery Rd, Cardinal's Meadow
18 April 2026
on Rhinanthus minor
sue
Whitwick, Coalville Meadows SSSI
23 April 2026
on Rhinanthus minor
sue
Whitwick, Coalville Meadows SSSI
23 April 2026
on Rhinanthus minor