Plasmopara destructor Görg & Thines, 2017on Impatiens
gall
on Impatiens
gall
Leaves, pale, margins rolled inwards; the plants are stunted, flowering little or not; at the underside of the leaves a greyish white down of erect, in their upper section repeatedly branched conidiophores.
hostplants
Balsaminaceae, narrowly monophagous
Impatiens walleriana.
notes
First observed in 2003; soon afterwards it had become mondially a major problem in the horticulture of buzy lizzie.
references
Görg, Ploch, Kruse ao (2017a).
25/05/2017