Powdery mildewCaused by: Erisyphe heraclei
Problem Category: Fungal Disease
Symptoms: Powdery growth on leaves, petioles flowers stalks and bracts; leaves becoming chlorotic; severe infections can cause flowers to become distorted
Comments: Fungus can spread long distances in air; disease emergence is favored by high humidity and moderate temperatures; infection is most severe in shaded areas
Management: Plant tolerant varieties; avoid excess fertilization; protective fungicide applications provide adequate protection.
Control: Spray 6 litres Fermented butter milk to control the powdery midew