Plant Diagnosis

Downy Mildew of rose, sunflower, marigold Critical

Yellowing of upper leaf surfaces with grayish downy growth underneath caused by Oomycetes like Peronospora, Plasmopara in Jan–March, July–Oct .

Description

Caused by oomycetes like Peronospora, it thrives in cool, moist conditions. Infection leads to leaf curling, stunted growth, and eventual defoliation. Symptoms include yellow spots and grey mold on the underside of leaves.

Symptoms

• Yellow patches on upper leaf surface, downy growth underneath.